Earphone power consumption control method, device, program product and earphone

Abstract

The application provides an earphone power consumption control method, device, program product and earphone, and belongs to the technical field of earphones, and comprises the following steps: in the earphone wearing state is the wearing state, according to the environmental noise signal and the noise threshold, the noise reduction processing module is controlled to carry out hierarchical noise reduction; in the earphone wearing state is the unwearing state, the noise collection module, the noise reduction processing module and the power amplifier driving module are controlled to enter the dormant state. The earphone wearing state is determined by the static cavity impedance and the silent loop current, without additionally adding hardware devices such as sensors, the power consumption loss of the hardware devices such as sensors can be reduced. According to the environmental noise signal and the noise threshold, the noise reduction processing module is controlled to carry out hierarchical noise reduction, which can avoid always full-power high-load noise reduction, reduce invalid power consumption and reduce the overall power consumption of the earphone. The noise collection module, the noise reduction processing module and the power amplifier driving module are controlled to stop working, which can reduce invalid power consumption and reduce the overall power consumption of the earphone.

Description

Technical Field

[0001] This application belongs to the field of headphone technology, and in particular relates to a headphone power consumption control method, device, program product, and headphone. Background Technology

[0002] With the rapid development of consumer electronics technology, over-ear Bluetooth headphones, neckband Bluetooth headphones, and closed-back in-ear headphones have become indispensable portable devices for people's daily commutes, work, and leisure. In particular, headphones with active noise cancellation have been widely popularized and applied due to their advantages of effectively isolating external environmental noise and enhancing the immersive listening experience.

[0003] However, during the use of headphones, in order to ensure the stable operation of functions such as audio playback, noise reduction, and wireless communication, they need to be in continuous operation, which leads to high power consumption and shortens the battery life of the headphones. Summary of the Invention

[0004] The purpose of this application is to provide a headphone power consumption control method, device, program product, and headphone, which aims to solve the problem of excessive power consumption in traditional headphones during use.

[0005] This application provides a headphone power consumption control method, applied to a headphone, the headphone including a sound generation module, a noise acquisition module, a noise reduction processing module, and a power amplifier driving module, the headphone power consumption control method including: Obtain the static cavity impedance and silent loop current of the sound-generating module; The earphone wearing status is determined based on the static cavity impedance and the silent circuit current; When the headphones are in the wearing state, the noise reduction processing module is controlled to perform graded noise reduction based on the ambient noise signal and the noise threshold. When the headphones are not worn, the noise acquisition module, the noise reduction processing module, and the power amplifier driver module enter a sleep state.

[0006] In some embodiments, before obtaining the static cavity impedance and silent loop current of the sound-generating module, the method further includes: Based on the headphone battery voltage and voltage threshold, the sampling parameters and the noise threshold are determined; wherein, the sampling parameters include the impedance sampling frequency corresponding to the static cavity impedance, the current sampling resolution and current sampling range corresponding to the silent loop current, and the noise sampling frequency corresponding to the ambient noise signal.

[0007] In some embodiments, obtaining the static cavity impedance and silent loop current of the sound-generating module includes: The static cavity impedance is obtained based on the impedance sampling frequency. The silent loop current is acquired based on the current sampling resolution and the current sampling range.

[0008] In some embodiments, determining the earphone wearing state based on the static cavity impedance and the silent circuit current includes: If the static cavity impedance is greater than the first impedance threshold and the silent circuit current is less than the first current threshold, then the earphone wearing state is the wearing state. If the static cavity impedance is less than the second impedance threshold and the silent circuit current is greater than the second current threshold, then the earphone is in an unworn state.

[0009] In some embodiments, controlling the noise reduction processing module to perform graded noise reduction based on the environmental noise signal and the noise threshold includes: The environmental noise signal is acquired based on the noise sampling frequency. If the ambient noise signal is less than the first noise threshold, the signal branch, power supply branch, and noise reduction algorithm process of the noise reduction processing module are shut down.

[0010] In some embodiments, controlling the noise reduction processing module to perform graded noise reduction based on the environmental noise signal and the noise threshold further includes: If the ambient noise signal is greater than the first noise threshold and less than the second noise threshold, then the feedback enhancement branch of the noise reduction processing module is turned off, the filter order and noise reduction feedback gain in the noise reduction algorithm are reduced, and the low-pass filter function in the noise reduction algorithm is turned on.

[0011] In some embodiments, controlling the noise reduction processing module to perform graded noise reduction based on the environmental noise signal and the noise threshold further includes: If the ambient noise signal is greater than the second noise threshold, then the feedback enhancement branch and the feedforward noise reduction branch of the noise reduction processing module are turned on, the low-pass filter function and the high-pass filter function in the noise reduction algorithm are turned on, the filter order, noise reduction feedback gain and noise sampling refresh rate in the noise reduction algorithm are increased, and the noise reduction parameters in the noise reduction algorithm are dynamically corrected in real time.

[0012] This application provides a headphone power consumption control device, including: Impedance current detection module detects the static cavity impedance and silent circuit current of the sound-generating module; Noise acquisition module, used to detect environmental noise signals; A control module, connected to the impedance current detection module, is used to acquire the static cavity impedance and the silent circuit current, and determine the earphone wearing status based on the static cavity impedance and the silent circuit current. The control module is also used to connect to the noise acquisition module to acquire the ambient noise signal, and when the headphones are in the wearing state, control the noise reduction processing module to perform graded noise reduction based on the ambient noise signal and the noise threshold. The control module is also used to control the noise acquisition module, the noise reduction processing module, and the power amplifier drive module to enter a sleep state when the headphones are not worn.

[0013] This application provides a computer program product, including a computer program that, when run by a processor, causes the method described in any of the above embodiments to be executed.

[0014] This application provides an earphone, including any of the earphone power consumption control devices described in the above embodiments.

[0015] This application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method described above.

[0016] The beneficial effects of the embodiments of the present invention compared with the prior art are as follows: Determining headphone wearing status by using static cavity impedance and silent loop current eliminates the need for infrared and capacitive sensors, reducing costs and enabling sensorless wearing detection. Furthermore, determining wearing status through static cavity impedance and silent loop current eliminates the need for additional sensors and other hardware, reducing power consumption. Moreover, by detecting wearing status from two different parameter perspectives, the accuracy of headphone wearing status detection is improved, and the probability of false positives is reduced.

[0017] When the headphones are in the wearing state, the ambient noise signal can be compared with a noise threshold to classify the magnitude of the ambient noise signal. Then, based on the comparison result, the headphone's noise cancellation module is controlled to perform graded noise cancellation, achieving different levels of noise cancellation processing such as no noise cancellation, light noise cancellation, or deep noise cancellation. Therefore, by controlling the noise cancellation module to perform graded noise cancellation based on the ambient noise signal and noise threshold while the headphones are in the wearing state, continuous high-power noise cancellation can be avoided, reducing unnecessary power consumption and lowering the overall power consumption of the headphones.

[0018] When the headphones are not worn, there is no need to collect noise, perform noise reduction processing, or drive the power amplifier. This allows the headphone's noise acquisition module, noise reduction processing module, and power amplifier driving module to enter a sleep state, turning them off and preventing them from working. This reduces unnecessary power consumption and lowers the overall power consumption of the headphones.

[0019] Therefore, the headphone power consumption control method provided in this application determines the headphone wearing state through static cavity impedance and silent loop current, eliminating the need for additional sensors or other hardware devices and reducing power consumption of such devices. Furthermore, when the headphones are worn, the noise reduction processing module performs graded noise reduction based on the ambient noise signal and noise threshold, avoiding continuous full-power, high-load noise reduction and reducing ineffective power consumption, thus lowering the overall power consumption of the headphones. When the headphones are not worn, the noise acquisition module, noise reduction processing module, and power amplifier driver module are deactivated, further reducing ineffective power consumption and lowering the overall power consumption of the headphones. Therefore, the headphone power consumption control method provided in this application solves the problem of excessive power consumption in traditional headphones during use. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 The following are schematic diagrams illustrating the steps of the headphone power consumption control method in some embodiments provided in this application.

[0022] Figure 2 The following is a flowchart illustrating the steps of the headphone power consumption control method in some embodiments provided in this application.

[0023] Figure 3 The following are schematic diagrams of the structure of the headphones in some embodiments provided in this application. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, in the embodiments of this application, the terms "first" and "second" are used to distinguish identical or similar items that have substantially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or order of execution, and that "first" and "second" do not necessarily imply difference.

[0028] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between the related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0029] Please see Figure 1 This application provides a headphone power consumption control method, applied to headphones, which include a sound generation module, a noise acquisition module, a noise reduction processing module, and a power amplifier driving module. The headphone power consumption control method includes: Step S10: Obtain the static cavity impedance and silent circuit current of the sound-generating module; Step S20: Determine the earphone wearing status based on the static cavity impedance and the silent circuit current; Step S30: When the headphones are in the wearing state, the noise reduction processing module 30 is controlled to perform graded noise reduction based on the ambient noise signal and the noise threshold. Step S40: When the headphones are not in a wearing state, the noise acquisition module 40, noise reduction processing module 30, and power amplifier driver module 50 are put into a sleep state. The connection relationship between the noise acquisition module 40, noise reduction processing module 30, and power amplifier driver module 50 can be found in [reference needed]. Figure 3 As shown.

[0030] In this embodiment, in step S10, the sound-generating module can be a dynamic driver. Static cavity impedance can be understood as the acoustic impedance of the air inside the earcup or earplug cavity when there is no sound vibration and it is static. Silent circuit current can be understood as the operating current of the sound-generating module circuit when the headphones are silent and there is no audio.

[0031] In step S20, the static cavity impedance, as an acoustic impedance parameter, characterizes the ability of the sealed cavity formed by the earcups and the ear to block environmental noise, and reflects the change in cavity impedance before and after the user wears the headphones. The silent loop current is the static operating current of the sound-generating module's sound-generating circuit in a silent state. When a user wears headphones, the earcups and the ear form a sealed cavity, changing the acoustic impedance of the cavity and causing a change in the equivalent load impedance of the sound-generating module, which in turn causes corresponding fluctuations in the silent loop current. Therefore, both the static cavity impedance and the silent loop current can reflect whether the user is wearing headphones. Determining the headphone wearing status through static cavity impedance and silent loop current eliminates the need for infrared sensors and capacitive sensors, reducing costs and achieving sensorless wearing detection. Thus, determining the headphone wearing status through static cavity impedance and silent loop current eliminates the need for additional sensors and other hardware, reducing the power consumption of such hardware. Furthermore, the wearing status of the headphones is determined by the static cavity impedance and the silent circuit current. This detection from the perspective of two different parameters improves the accuracy of the wearing status and reduces the probability of misjudgment.

[0032] In step S30, the noise reduction processing module 30 can be understood as the core unit for the headphones to achieve active noise cancellation. When the headphones are in the wearing state, by comparing the ambient noise signal with a noise threshold, the magnitude of the ambient noise signal can be graded. Then, based on the comparison result, the noise reduction processing module 30 of the headphones is controlled to perform graded noise reduction, achieving different levels of noise reduction processing such as no noise reduction, light noise reduction, or deep noise reduction. Therefore, by controlling the noise reduction processing module 30 to perform graded noise reduction based on the ambient noise signal and noise threshold while the headphones are in the wearing state, continuous high-power noise reduction can be avoided, reducing ineffective power consumption and lowering the overall power consumption of the headphones.

[0033] In step S40, the headphone wearing state is in the non-wearing state, which can also be understood as the user not wearing the headphones. The noise acquisition module 40 can be understood as a module used to collect ambient noise and residual noise in the ear. The power amplifier driver module 50 can be understood as amplifying the noise reduction electrical signal and driving the sound-generating module to vibrate and generate sound. When the headphone wearing state is non-wearing, there is no need to collect noise, no need for noise reduction processing, and no need for power amplifier driving. Therefore, the noise acquisition module 40, noise reduction processing module 30, and power amplifier driver module 50 of the headphones are controlled to enter a sleep state, so that the noise acquisition module 40, noise reduction processing module 30, and power amplifier driver module 50 are turned off and no longer work, which can reduce unnecessary power consumption and reduce the overall power consumption of the headphones.

[0034] Therefore, the headphone power consumption control method provided in this application determines the headphone wearing state through static cavity impedance and silent loop current, eliminating the need for additional sensors or other hardware devices and reducing power consumption of such devices. Furthermore, when the headphones are in the wearing state, the noise reduction processing module 30 is controlled to perform graded noise reduction based on the ambient noise signal and noise threshold, avoiding continuous full-power high-load noise reduction and reducing ineffective power consumption, thus lowering the overall power consumption of the headphones. When the headphones are not in the wearing state, the noise acquisition module 40, noise reduction processing module 30, and power amplifier driver module 50 are deactivated, further reducing ineffective power consumption and lowering the overall power consumption of the headphones. Therefore, the headphone power consumption control method provided in this application can solve the problem of excessive power consumption in traditional headphones during use.

[0035] Please see Figure 2 In some embodiments, before obtaining the static cavity impedance and silent loop current of the sound-generating module in step S10, the headphone power consumption control method further includes: Step S01: Determine the sampling parameters and noise threshold based on the headphone battery voltage and voltage threshold.

[0036] In this embodiment, step S01 can be understood as the headphone's power-on initialization step. The control module 20 acquires the headphone battery voltage. When the headphone battery voltage is at a first voltage threshold, a full set of high-precision sampling parameters and a standard noise reduction threshold are configured. When the headphone battery voltage is greater than a second voltage threshold but less than the first voltage threshold, automatic fine-tuning of the noise reduction gain is configured, and the sampling parameters are reduced to avoid excessive power consumption. When the headphone battery voltage is less than the second voltage threshold, a low-power basic mode is configured to disable deep noise reduction while retaining the wear detection function.

[0037] The sampling parameters include the impedance sampling frequency corresponding to the static cavity impedance, the current sampling resolution and current sampling range corresponding to the silent loop current, the noise sampling frequency corresponding to the environmental noise signal, the A / D sampling accuracy, the number of consecutive sampling filters, the number of anti-shake sampling frames, the sampling signal amplification factor, and the reference voltage bias value, etc.

[0038] In some embodiments, the first voltage threshold is 3.6V to 3.8V, specifically 3.7V. The second voltage threshold is 3.2V to 3.4V, specifically 3.3V.

[0039] In some embodiments, step S10, obtaining the static cavity impedance and silent loop current of the sound-generating module, includes: Step S110: Obtain the static cavity impedance based on the impedance sampling frequency; Step S120: The silent loop current is acquired based on the current sampling resolution and current sampling range.

[0040] In this embodiment, the impedance sampling frequency can be understood as the frequency at which the static cavity impedance is acquired during the impedance sampling process. The current sampling resolution can be understood as the minimum current change during the current sampling process. The current sampling range can be understood as the current interval from the minimum to the maximum measured current during the current sampling process.

[0041] By adjusting the impedance sampling frequency and / or current sampling resolution and / or current sampling range based on changes in the headphone battery voltage, invalid power consumption during the sampling process can be reduced, thereby lowering the overall power consumption of the headphones and extending their battery life.

[0042] In some embodiments, step S20, determining the earphone wearing state based on the static cavity impedance and the silent loop current, includes: Step S210: If the static cavity impedance is greater than the first impedance threshold and the silent circuit current is less than the first current threshold, then the earphone is in the wearing state.

[0043] In this embodiment, when the headphones are in the "worn" state, the user's ears are inserted into the earcups, forming a closed acoustic cavity with the auricle and ear canal. The air behind the sound-generating module (which can also be understood as a dynamic speaker) is sealed off, significantly increasing the air damping of the diaphragm vibration. This leads to a significant increase in the equivalent impedance of the sound-generating module and a significant decrease in the silent circuit current. Therefore, the decrease in silent circuit current and the increase in static cavity impedance indicate that the headphones are in the "worn" state.

[0044] Therefore, in step S210, a first impedance threshold and a first current threshold are set as the basis for determining whether the static cavity impedance and the silent circuit current increase or decrease. The first impedance threshold can be 34Ω to 36Ω. The first current threshold can be 7mA to 9mA. When the static cavity impedance is greater than the first impedance threshold and the silent circuit current is less than the first current threshold, the earphone is considered to be in a worn state. By jointly identifying the earphone wearing state through the static cavity impedance and the silent circuit current, dual judgment of impedance and current is achieved. Compared with traditional sensors, this is more stable, improves the accuracy of earphone wearing status, and reduces the probability of false judgment.

[0045] In some embodiments, the first impedance threshold can be 35Ω. The first current threshold can be 8mA. When the static cavity impedance is greater than 35Ω and the silent circuit current is less than 8mA, the earphone is considered to be in a worn state.

[0046] In some embodiments, step S20, determining the earphone wearing state based on the static cavity impedance and the silent circuit current, further includes: Step S220: If the static cavity impedance is less than the second impedance threshold and the silent circuit current is greater than the second current threshold, then the earphone is in an unworn state.

[0047] In this embodiment, when the headphones are not worn, the earcups are open, allowing airflow between the front and rear of the sound-generating module, resulting in low acoustic damping. Consequently, the diaphragm vibration resistance of the sound-generating module is low, leading to a decrease in the equivalent impedance of the sound-generating module and an increase in the silent circuit current. Furthermore, the increase in silent circuit current and the decrease in static cavity impedance confirm that the headphones are not worn.

[0048] Therefore, in step S220, a second impedance threshold and a second current threshold are set as the basis for determining whether the static cavity impedance and the silent circuit current decrease or increase. The second impedance threshold can be from 31Ω to 33Ω. The second current threshold can be from 11mA to 13mA. When the static cavity impedance is less than the second impedance threshold and the silent circuit current is greater than the second current threshold, the earphone is considered to be in an unworn state. By jointly identifying the earphone wearing state through the static cavity impedance and the silent circuit current, a dual judgment of impedance and current is achieved. Compared with traditional sensors, this is more stable, improves the accuracy of earphone wearing status, and reduces the probability of false judgment.

[0049] In some embodiments, the second impedance threshold is 32Ω, and the second current threshold is 12mA. A hysteresis buffer is provided between the first and second impedance thresholds. For example, the second impedance threshold is 32Ω, the first impedance threshold can be 35Ω, and a 3Ω hysteresis buffer is provided between them. A hysteresis buffer is also provided between the second and first current thresholds. For example, the second current threshold is 12mA, the first current threshold is 8mA, and a buffer zone of 8mA to 12mA is provided between them. By providing hysteresis buffers between the first and second impedance thresholds and buffer zones between the second and first current thresholds, critical point jumps can be prevented, further improving the accuracy of dual impedance and current judgment.

[0050] In some embodiments, during the process of determining whether the headphones are being worn, the static cavity impedance and silent loop current are sampled multiple times to ensure the accuracy of the acquired data, which helps to further improve the accuracy of the dual judgment of impedance and current.

[0051] In some embodiments, step S30, controlling the noise reduction processing module 30 to perform graded noise reduction based on the environmental noise signal and the noise threshold, includes: Step S310: Collect the environmental noise signal according to the noise sampling frequency; In step S320, if the ambient noise signal is less than the first noise threshold, the signal branch, power supply branch, and noise reduction algorithm process of the noise reduction processing module 30 are shut down.

[0052] In this embodiment, in step S310, the noise acquisition module 40 acquires ambient noise signals according to the noise sampling frequency and sends them to the control module 20. The noise sampling frequency can be understood as the frequency at which the ambient noise signals are acquired. By adjusting the noise sampling frequency based on the changes in the headphone battery voltage, invalid power consumption during the sampling process can be reduced, the overall power consumption of the headphones can be lowered, and the battery life of the headphones can be extended.

[0053] The control module 20 acquires the ambient noise signal. Then, in step S320, when the ambient noise signal is less than the first noise threshold, it indicates that the noise level in the external environment is low, and there is no need to additionally control the noise reduction processing module 30 to reduce the ambient noise signal. Furthermore, when the ambient noise signal is less than the first noise threshold, the signal branch, power supply branch, and noise reduction algorithm process of the noise reduction processing module 30 are shut down, causing the noise reduction processing module 30 to stop working and reducing overall power consumption. Through step S320 provided in this application, when the ambient noise signal is less than the first noise threshold, the hardware circuitry and software algorithm of the noise reduction processing module 30 are completely shut down, reducing unnecessary power consumption and thus lowering the overall power consumption of the headphones.

[0054] In some embodiments, the first noise threshold can be between 29 dB and 31 dB. Specifically, the first noise threshold can be 30 dB.

[0055] In some embodiments, step S30, which controls the noise reduction processing module 30 to perform graded noise reduction based on the environmental noise signal and the noise threshold, further includes: In step S330, if the ambient noise signal is greater than the first noise threshold and less than the second noise threshold, the feedback enhancement branch of the noise reduction processing module 30 is turned off, the filtering order and noise reduction feedback gain in the noise reduction algorithm are reduced, and the low-pass filtering function in the noise reduction algorithm is turned on.

[0056] In this embodiment, the second noise threshold can be between 49dB and 51dB. Specifically, the second noise threshold can be 50dB. When the ambient noise signal is greater than the first noise threshold and less than the second noise threshold, the noise reduction processing module 30 is controlled to perform mild noise reduction. Furthermore, in step S330, the feedback enhancement branch of the noise reduction processing module 30 is turned off, and the feedforward noise reduction branch is turned on. The feedforward noise reduction branch is used to unidirectionally generate reverse cancellation sound waves to achieve basic environmental noise reduction, and has the characteristics of low power consumption, fast response, and natural sound. The feedback enhancement branch is used to continuously enhance the intensity of the reverse cancellation sound waves to achieve deep low-frequency noise reduction, and has the characteristics of higher power consumption and easy to cause ear pressure sensation. The noise reduction processing module 30 is used to execute a preset noise reduction algorithm to process the input signal for noise reduction.

[0057] Furthermore, when the ambient noise signal is greater than the first noise threshold and less than the second noise threshold, the feedback enhancement branch of the noise reduction processing module 30 is turned off and the feedforward noise reduction branch is turned on. This can reduce power consumption while achieving basic ambient noise reduction, thereby reducing ineffective power consumption and lowering the overall power consumption of the headphones.

[0058] Furthermore, when the ambient noise signal is greater than the first noise threshold and less than the second noise threshold, the filtering order in the noise reduction algorithm is reduced from a high order to a low order, which can effectively reduce the amount of computation and signal delay, further reduce power consumption, avoid audio distortion and ear pressure caused by over-filtering, and improve wearing comfort.

[0059] When the ambient noise signal is greater than the first noise threshold and less than the second noise threshold, reducing the noise reduction feedback gain to 40% to 50% of the rated gain can effectively reduce power consumption and help achieve a comfortable and gentle noise reduction effect in a low-noise environment.

[0060] When the ambient noise signal is greater than the first noise threshold and less than the second noise threshold, the low-pass filtering function in the noise reduction algorithm is enabled. This cancels out only the low- and mid-frequency ambient noise, while preserving the clarity of high-frequency ambient sounds, and further reduces power consumption.

[0061] Therefore, through step S330 provided in this application, when the ambient noise signal is greater than the first noise threshold and less than the second noise threshold, some hardware circuits (such as the feedback enhancement branch) of the noise reduction processing module 30 are turned off, and the filtering order, feedback gain and low-pass filtering function of the noise reduction algorithm in the noise reduction processing module 30 are processed accordingly, which can further reduce the ineffective power consumption, thereby reducing the overall power consumption of the headphones.

[0062] In some embodiments, step S30, which controls the noise reduction processing module 30 to perform graded noise reduction based on the environmental noise signal and the noise threshold, further includes: In step S340, if the ambient noise signal is greater than the second noise threshold, the feedback enhancement branch and feedforward noise reduction branch of the noise reduction processing module 30 are turned on, the low-pass filter function and high-pass filter function in the noise reduction algorithm are turned on, the filter order, noise reduction feedback gain and noise sampling refresh rate in the noise reduction algorithm are increased, and the noise reduction parameters in the noise reduction algorithm are dynamically corrected in real time.

[0063] In this embodiment, when the ambient noise signal is greater than the second noise threshold, the noise reduction processing module 30 is controlled to perform deep noise reduction. Furthermore, in step S340, when the ambient noise signal is greater than the second noise threshold, the feedback enhancement branch and the feedforward noise reduction branch of the noise reduction processing module 30 are activated, which can achieve full noise reduction and effectively suppress strong ambient noise.

[0064] When the ambient noise signal is greater than the second noise threshold, the low-pass filter and high-pass filter functions in the noise reduction algorithm are enabled, which can cover low-frequency, mid-frequency and high-frequency noise cancellation across the entire frequency band, achieve full-band ambient noise filtering, and improve the noise reduction coverage and noise reduction depth.

[0065] Furthermore, when the ambient noise signal is greater than the second noise threshold, the filter order, noise reduction feedback gain, and noise sampling refresh rate in the noise reduction algorithm are increased. This enables the full-order adaptive filtering algorithm, maximizing the gain of both the noise reduction feedback and feedforward branches, and rapidly acquiring dynamic changes in ambient noise.

[0066] When the ambient noise signal is greater than the second noise threshold, the noise reduction parameters in the control noise reduction algorithm are dynamically corrected in real time, which can achieve adaptive noise reduction, adapt to strong ambient noise fluctuations, and help improve noise reduction accuracy and environmental adaptability.

[0067] Therefore, through step S340 provided in this application, when the ambient noise signal is greater than the second noise threshold, the feedback enhancement branch and feedforward noise reduction branch of the noise reduction processing module 30 are turned on, the low-pass filter function and high-pass filter function in the noise reduction algorithm are turned on, the filter order, noise reduction feedback gain and noise sampling refresh rate in the noise reduction algorithm are increased, and the noise reduction parameters in the noise reduction algorithm are dynamically corrected in real time. This can achieve adaptive noise reduction, isolate external interference, and improve the audio immersion and call clarity of the headphones.

[0068] By using step S30 provided in this application, based on the environmental noise signal and noise threshold, the noise reduction processing module 30 is controlled to perform noise reduction on demand, including noise reduction off, light noise reduction, and deep noise reduction, which can reduce power consumption by more than 40%. Furthermore, by using steps S40 and S50 provided in this application, the noise acquisition module 40, the noise reduction processing module 30, and the power amplifier drive module 50 are controlled to enter a sleep state, which can reduce the sleep current to less than 10 microamps, significantly improving battery life.

[0069] In some embodiments, in step S30, when the headphones are in a worn state, after controlling the noise reduction processing module 30 to perform graded noise reduction based on the ambient noise signal and the noise threshold, the headphone power consumption control method further includes: In step S50, the power amplifier driver module 50 is controlled to drive the sound-producing module to produce sound, and step S10 is continued.

[0070] In this embodiment, the power amplifier driver module 50 is used to amplify the audio signal formed after the noise reduction processing module 30 performs graded noise reduction in step S30, output the audio signal, and drive the sound generation module to generate sound.

[0071] In some embodiments, the headphone power consumption control method further includes: In step S60, when the headphones are in a mute state, the noise acquisition module 40, the noise reduction processing module 30, and the power amplifier drive module 50 are put into a sleep state, and step S10 is continued.

[0072] In this embodiment, when the headphones are in a muted state, the noise acquisition module 40, noise reduction processing module 30, and power amplifier drive module 50 are controlled to enter a sleep state, just as when the headphones are not worn. The headphones retain the control module 20 (which can also be understood as a microcontroller unit MCU) and the battery voltage sampling module to maintain low-power standby.

[0073] In steps S40 and S60, the control module 20 (which can also be understood as a microcontroller unit (MCU)) controls the analog switch or power MOSFET through a general purpose input / output (GPIO) port to cut off the power supply links to the noise acquisition module 40, the noise reduction processing module 30, and the power amplifier driver module 50. Furthermore, the control module 20 (also understood as the MCU) itself enters a low-power shutdown mode, with the overall sleep current controlled within microamperes, and the circuit enters a microampere-level sleep state. By continuing to execute step S10 for cyclic detection, dynamic real-time optimization of the headphone power consumption can be achieved.

[0074] In some embodiments, in step S60, when the headphones are in a muted state, they are muted manually by the user, such as by the user's headphone touch control or by manually muting or pausing playback via the APP.

[0075] In some embodiments, when the headphones are in a mute state in step S60, they can also be automatically muted, for example, if there is no audio signal input for 3 consecutive seconds, it is determined to be in an automatic mute state.

[0076] Therefore, the headphone power consumption control method provided in this application can control the hardware structures such as the noise acquisition module 40, noise reduction processing module 30, and power amplifier driver module 50 to enter a sleep state when the headphones are not worn, thus eliminating constant power consumption. The headphone power consumption control method also allows the noise reduction processing module 30 to be controlled to not activate deep noise reduction in non-high-noise environments and to directly shut down the noise reduction channel in low-noise environments when the headphones are worn, based on a comparison between the ambient noise signal and the noise threshold. This enables on-demand start / stop, avoiding continuous high-load operation of the noise reduction processing module 30, reducing ineffective power consumption, and lowering the overall power consumption of the headphones.

[0077] Please see Figure 3This application provides a headphone power consumption control device 100. The headphone power consumption control device 100 includes an impedance current detection module 10, a control module 20, a noise reduction processing module 30, a noise acquisition module 40, and a power amplifier driver module 50. The impedance current detection module 10 detects the static cavity impedance and silent loop current of the sound-generating module. The noise acquisition module 40 is used to detect ambient noise signals. The control module 20 is connected to the impedance current detection module 10 and is used to acquire the static cavity impedance and silent loop current, and determine the headphone wearing state based on the static cavity impedance and silent loop current. The control module 20 is also connected to the noise acquisition module 40 and is used to acquire ambient noise signals. When the headphone wearing state is "worn," the control module 20 is also used to control the noise reduction processing module 30 to perform graded noise reduction based on the ambient noise signal and a noise threshold. When the headphone wearing state is "not worn," the control module 20 is also used to control the noise acquisition module 40, the noise reduction processing module 30, and the power amplifier driver module 50 to enter a sleep state.

[0078] In this embodiment, the impedance current detection module 10 includes a differential operational amplifier circuit, a high-precision low-resistance sampling resistor, and a DC impedance sampling branch. The DC impedance sampling branch and the high-precision low-resistance sampling resistor are connected in series between the common negative circuit of the left and right sound modules (e.g., speakers). The differential operational amplifier circuit is connected to both ends of the sampling resistor to collect the voltage across the sampling resistor. The control module 20 is connected to the output of the differential operational amplifier circuit and can detect the current and voltage fluctuations of the sound module (e.g., speaker) circuit in real time by detecting the voltage across the sampling resistor, thereby realizing the detection of static cavity impedance and silent circuit current. The differential operational amplifier circuit can avoid common-mode interference and accurately pick up the instantaneous voltage and current fluctuations of the speaker circuit.

[0079] The noise acquisition module 40 includes a feedback microphone, an AC-coupled amplifier circuit, an RC filter circuit, and an A / D sampling input circuit. It is used to pick up ambient noise signals and send them to the control module 20 for amplitude calculation. The output of the feedback microphone is connected to the input of the AC-coupled amplifier circuit, and the output of the AC-coupled amplifier circuit is connected to the input of the RC filter circuit. The output of the RC filter circuit is connected to the input of the A / D sampling input circuit. The output of the A / D sampling input circuit is connected to the control module 20, thus realizing the acquisition, amplification, filtering, and analog-to-digital conversion of the ambient noise signal.

[0080] The control module 20 can be a microcontroller unit (MCU), and the relevant description can be found in the above embodiments. The noise reduction processing module 30 includes a feedback enhancement branch and a feedforward noise reduction branch, and has built-in algorithm logic without an additional external digital signal processor (DSP).

[0081] The power amplifier driver module 50 includes a Class D power amplifier chip (which can also be understood as a digital power amplifier chip), an audio coupling capacitor, an output source wave network, and a speaker load circuit. The input terminal of the Class D power amplifier chip is connected to the noise reduction processing module 30, the output terminal of the Class D power amplifier chip is connected to the input terminal of the audio coupling capacitor, the output terminal of the audio coupling capacitor is connected to the input terminal of the output source wave network, and the output terminal of the output source wave network is connected to the speaker load circuit, together realizing the power amplifier driving function.

[0082] The headphone power consumption control device 100 provided in this application uses a single MCU to complete wear detection, noise cancellation switching and power consumption management. It requires no extra components and can achieve simple, reliable, low-power and low-cost adaptive noise cancellation control. It has the advantages of minimal structure, reduced components, simple wiring, high yield and low cost.

[0083] In some embodiments, during steps S40 and S50, when the control module 20 controls the noise acquisition module 40, the noise reduction processing module 30, and the power amplifier drive module 50 to enter a sleep state, the power switch module 60 cuts off the power supply branch from the power supply module 70 to the noise acquisition module 40, the noise reduction processing module 30, and the power amplifier drive module 50, so that the noise acquisition module 40, the noise reduction processing module 30, and the power amplifier drive module 50 are turned off and no longer work, thereby reducing ineffective power consumption and lowering the overall power consumption of the headphones.

[0084] In some embodiments, the power switch module 60 includes a PMOS power switch circuit. The PMOS power switch circuit is connected to the GPIO pin of the control module 20 and the power supply terminals of the noise acquisition module 40, the noise reduction processing module 30, and the power amplifier drive module 50 to achieve controllable power cut-off.

[0085] This application provides a computer program product, including a computer program that, when run by a processor, causes the method of any of the above embodiments to be executed.

[0086] This application provides an earphone, including the earphone power consumption control device described in the above embodiments.

[0087] In this embodiment, the headphones provided in this application can be wireless headphones, noise-canceling headphones, neckband Bluetooth headphones, or closed-back in-ear headphones, etc.

[0088] In some embodiments, this application provides a headset, including a headband, a left earcup unit, and a right earcup unit. The impedance current detection module 10, control module 20, noise reduction processing module 30, noise acquisition module 40, power amplifier drive module 50, power switch module 60, and sound generation module in the headset power consumption control device 100 can be respectively disposed in the left earcup unit and the right earcup unit according to actual conditions. A power supply module 70 (e.g., a lithium battery) is disposed inside the headband of the headset, connecting the circuits within the left and right earcup units via wires; no external sensors are exposed.

[0089] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0090] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0091] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0092] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0093] In the embodiments provided in this application, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0094] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0095] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0096] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0097] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A headphone power consumption control method, applied to headphones, characterized in that, The headphones include a sound-generating module, a noise acquisition module, a noise reduction processing module, and a power amplifier driving module. The headphone power consumption control method includes: Obtain the static cavity impedance and silent circuit current of the sound-generating module; The earphone wearing status is determined based on the static cavity impedance and the silent circuit current; When the headphones are in the wearing state, the noise reduction processing module is controlled to perform graded noise reduction based on the ambient noise signal and the noise threshold. When the headphones are not being worn, the noise acquisition module, the noise reduction processing module, and the power amplifier driver module are put into a sleep state.

2. The headphone power consumption control method as described in claim 1, characterized in that, Before obtaining the static cavity impedance and silent circuit current of the sound-generating module, the method further includes: Based on the headphone battery voltage and voltage threshold, the sampling parameters and the noise threshold are determined; wherein, the sampling parameters include the impedance sampling frequency corresponding to the static cavity impedance, the current sampling resolution and current sampling range corresponding to the silent loop current, and the noise sampling frequency corresponding to the ambient noise signal.

3. The headphone power consumption control method as described in claim 2, characterized in that, The process of obtaining the static cavity impedance and silent loop current of the sound-generating module includes: The static cavity impedance is obtained based on the impedance sampling frequency. The silent loop current is acquired based on the current sampling resolution and the current sampling range.

4. The headphone power consumption control method as described in claim 1, characterized in that, The step of determining the earphone wearing status based on the static cavity impedance and the silent circuit current includes: If the static cavity impedance is greater than the first impedance threshold and the silent circuit current is less than the first current threshold, then the earphone wearing state is the wearing state. If the static cavity impedance is less than the second impedance threshold and the silent circuit current is greater than the second current threshold, then the earphone is in an unworn state.

5. The headphone power consumption control method as described in claim 2, characterized in that, The step of controlling the noise reduction processing module to perform graded noise reduction based on the environmental noise signal and the noise threshold includes: The environmental noise signal is acquired based on the noise sampling frequency. If the ambient noise signal is less than the first noise threshold, the signal branch, power supply branch, and noise reduction algorithm process of the noise reduction processing module are shut down.

6. The headphone power consumption control method as described in claim 5, characterized in that, The step of controlling the noise reduction processing module to perform graded noise reduction based on the environmental noise signal and the noise threshold also includes: If the ambient noise signal is greater than the first noise threshold and less than the second noise threshold, then the feedback enhancement branch of the noise reduction processing module is turned off, the filter order and noise reduction feedback gain in the noise reduction algorithm are reduced, and the low-pass filter function in the noise reduction algorithm is turned on.

7. The headphone power consumption control method as described in claim 6, characterized in that, The step of controlling the noise reduction processing module to perform graded noise reduction based on the environmental noise signal and the noise threshold also includes: If the ambient noise signal is greater than the second noise threshold, then the feedback enhancement branch and the feedforward noise reduction branch of the noise reduction processing module are turned on, the low-pass filter function and the high-pass filter function in the noise reduction algorithm are turned on, the filter order, noise reduction feedback gain and noise sampling refresh rate in the noise reduction algorithm are increased, and the noise reduction parameters in the noise reduction algorithm are dynamically corrected in real time.

8. A headphone power consumption control device, characterized in that, include: Impedance current detection module detects the static cavity impedance and silent circuit current of the sound-generating module; Noise acquisition module, used to detect environmental noise signals; A control module, connected to the impedance current detection module, is used to acquire the static cavity impedance and the silent circuit current, and determine the earphone wearing status based on the static cavity impedance and the silent circuit current. The control module is also used to connect to the noise acquisition module to acquire the ambient noise signal, and when the headphones are in the wearing state, control the noise reduction processing module to perform graded noise reduction based on the ambient noise signal and the noise threshold. The control module is also used to control the noise acquisition module, the noise reduction processing module, and the power amplifier drive module to enter a sleep state when the headphones are not worn.

9. A computer program product, characterized in that, Includes a computer program, which, when run by a processor, causes the method as described in any one of claims 1 to 7 to be performed.

10. An earphone, characterized in that, Includes the headphone power consumption control device as described in claim 8.

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