Noise reduction earphone and earphone device

Abstract

The utility model discloses a noise reduction earphone and an earphone device, a microphone module collects sound signals and converts the sound signals into electric signals, a voltage detection unit detects the voltage value of the electric signals, the voltage detection unit is connected with the microphone module and a filter unit, and the filter unit is connected with a loudspeaker unit. The signal processing module is connected with the voltage detection unit and the filter unit and is used for receiving the voltage value and outputting the adjusting signal, so that when the voltage value is greater than a specified value, the gain of the filter unit can be reduced through the adjusting signal, and finally, the output of the loudspeaker unit is a noise-reduced sound signal instead of a noise-increased sound signal; the problem of sound cracking caused by circuit synchronization gain amplification when a large sudden sound signal appears in the environment sound is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of earphones, in particular to a noise reduction earphone and an earphone device. Background Art

[0002] Adaptive ANC (Active Noise Cancellation) headphones will automatically adjust the filter gain according to the amount of leakage when worn by consumers to achieve a better noise reduction experience. However, the existing headphones use this method to adjust the filter gain. Once there is a large amount of leakage when worn, the adaptive ANC headphones will automatically increase the filter gain according to the ANC effect. When the filter gain is large enough, if there is a large burst sound signal in the ambient sound, the circuit will synchronously amplify the gain, which will cause the speaker to emit a distorted sound problem of "pu pu pu". Not only does it fail to achieve the purpose of noise reduction, but it increases noise, resulting in a poor experience. Utility Model Content

[0003] The embodiments of the present application provide a noise reduction headset and a headset device to solve at least one problem existing in the related art. The technical solution is as follows:

[0004] In a first aspect, an embodiment of the present application provides a noise reduction headset, comprising:

[0005] A microphone module, used to collect sound signals and convert them into electrical signals;

[0006] An active noise reduction module, comprising a voltage detection unit, a filter unit and a speaker unit, wherein the voltage detection unit is used to detect the voltage value of the electrical signal, the voltage detection unit is connected to the microphone module and the filter unit, and the filter unit is connected to the speaker unit;

[0007] A signal processing module is connected to the voltage detection unit and the filter unit, and is used to receive the voltage value and output an adjustment signal, wherein the adjustment signal is used to reduce the gain of the filter unit when the voltage value is greater than a specified value.

[0008] In one implementation, the speaker unit includes a processing unit and a speaker, and the processing unit is connected to the speaker and the filter unit.

[0009] In one implementation, the microphone module includes an FFMIC, the filter unit includes a first FF filter, and the voltage detection unit is connected to the FFMIC, the first FF filter, and the signal processing module.

[0010] In one implementation, the microphone module includes an FBMIC, the filter unit includes a first FB filter, and the voltage detection unit is connected to the FBMIC, the first FB filter, and the signal processing module.

[0011] In one implementation, the signal processing module includes a filter unit and a processor, the filter unit is connected to the processor and the voltage detection unit, and the processor is connected to the filter unit.

[0012] In one implementation, the filtering unit includes a second FF filter and a second FB filter.

[0013] In one embodiment, the voltage detection unit includes an FF detection unit and an FB detection unit, the microphone module includes FFMIC and FBMIC, and the filter unit includes a first FF filter and a first FB filter; the FF detection unit is connected to the first FF filter and the signal processing module, the FB detection unit is connected to the first FB filter and the signal processing module, the first FF filter is connected to the speaker unit, and the first FB filter is connected to the speaker unit.

[0014] In one implementation, the speaker unit includes a processing unit and a speaker, and the processing unit is connected to the speaker, the first FF filter, and the first FB filter.

[0015] In one implementation, the signal processing module is a DSP module.

[0016] In a second aspect, an embodiment of the present application provides an earphone device, comprising a charging box and the noise reduction earphone.

[0017] The beneficial effects of the above technical solution include at least:

[0018] The microphone module collects sound signals and converts them into electrical signals. The voltage detection unit detects the voltage value of the electrical signal. The voltage detection unit is connected to the microphone module and the filter unit. The filter unit is connected to the speaker unit. The signal processing module is connected to the voltage detection unit and the filter unit. It is used to receive the voltage value and output the adjustment signal. Therefore, when the voltage value is greater than the specified value, the gain of the filter unit can be reduced by adjusting the signal. Ultimately, the output of the speaker unit is a noise-reduced sound signal rather than a noise-enhanced sound signal, which effectively avoids the problem of distortion caused by the circuit synchronous gain amplification when a large burst sound signal appears in the ambient sound.

[0019] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0021] Figure 1 This is a block diagram of the noise-cancelling headphones according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0023] The terms "first", "second", "third", etc. in the specification and claims of this application and the drawings are only used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. Reference to "embodiments" herein means that the specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] The utility model is further explained and illustrated below in conjunction with the accompanying drawings and specific embodiments.

[0025] Reference Figure 1 An embodiment of the present application provides a noise reduction headset, including a microphone module, an active noise reduction module and a signal processing module.

[0026] Reference Figure 1In the embodiment of the present application, the microphone module is used to collect sound signals and convert them into electrical signals. Optionally, the microphone module includes FF MIC and FB MIC, and both FF MIC and FB MIC can collect sound signals and convert them into corresponding electrical signals respectively.

[0027] Reference Figure 1 In the embodiment of the present application, the active noise reduction module includes but is not limited to a voltage detection unit, a filter unit and a speaker unit. The voltage detection unit is used to detect the voltage value of the electrical signal, the voltage detection unit is connected to the microphone module and the filter unit, and the filter unit is connected to the speaker unit.

[0028] Reference Figure 1 Optionally, the voltage detection unit includes an FF detection unit and an FB detection unit, the FF detection unit is connected to the FF MIC and the signal processing module, and is used to detect the voltage value of the electrical signal output by the FF MIC, and the FB detection unit is connected to the FBMIC and the signal processing module, and is used to detect the voltage value of the electrical signal output by the FB MIC. It should be noted that the number of detection units in the voltage detection unit matches the number of microphones in the microphone module, so in some embodiments, the microphone module may include one of the FF MIC and the FB MIC, and the corresponding voltage detection unit may include the FF detection unit or the FB detection unit.

[0029] Optionally, the FF detection unit and the FB detection unit can both be processing chips including but not limited to having a digital-to-analog conversion function, using ADC voltage-to-digital conversion technology to collect analog voltage signals as digital quantities, and then read out the voltage values ​​through digital processing, or they can be ready-made voltage measurement modules or sensors that are directly arranged on the circuit, which can enable fast and accurate measurements.

[0030] Reference Figure 1 In the embodiment of the present application, the filter unit includes a first FF filter and a first FB filter, the first FF filter is connected to the FF detection unit, the signal processing module and the speaker unit; the first FB filter is connected to the FB detection unit, the signal processing module and the speaker unit. It should be noted that in other embodiments, the filter unit may include a first FF filter or a first FB filter, depending on the number of microphones in the microphone module and the situation of the detection unit in the voltage detection unit.

[0031] Reference Figure 1In an embodiment of the present application, the signal processing module is connected to the FF detection unit, the FB detection unit, the first FF filter and the first FB filter, and is used to receive a voltage value and output an adjustment signal. The adjustment signal is used to reduce the gain of the filter unit when the voltage value is greater than a specified value. Optionally, the signal processing module is a DSP module, which may include a filter unit and a processor CPU, the filter unit is connected to the processor CPU and the FF detection unit and the FB detection unit of the voltage detection unit, and the processor CPU is connected to the first FF filter and the first FB filter of the filter unit. It should be noted that the filter unit may include a second FF filter and a second FB filter, the second FF filter is connected to the FF detection unit, the second FB filter is connected to the FB detection unit, and the processor CPU is used to output an adjustment signal. In an embodiment of the present application, by adding a voltage detection unit and a signal processing module, effective noise reduction of burst sound signals can be achieved without affecting the original function of the headphones.

[0032] Reference Figure 1 In the embodiment of the present application, the speaker unit includes a processing unit and a speaker, the processing unit is connected to the speaker and the first FF filter and the first FB filter in the filter unit, the processing unit is used to process the electrical signal output by the first FF filter and the first FB filter, generate a corresponding equal-amplitude inverted electrical signal, and then the speaker converts the electrical signal into a sound wave signal for output. Optionally, the processing unit includes but is not limited to an MCU.

[0033] The working principle of the embodiment of the present application is described below:

[0034] For example, when the FF detection unit detects that the voltage value of the electrical signal output by the FF MIC is greater than the specified value, the signal processing module generates and outputs an adjustment signal, and the adjustment signal is sent to the first FF filter to reduce the gain stored in the first FF filter. Since the gain of the first FF filter is reduced, when the first FF filter filters and reduces the noise of the electrical signal output by the FF MIC, a noise-reduced electrical signal can be obtained instead of a noise-enhanced electrical signal. Therefore, the speaker unit finally outputs a noise-reduced sound signal instead of a noise-enhanced sound signal, which effectively avoids the problem of sound distortion caused by the circuit synchronous gain amplification when a large burst sound signal appears in the ambient sound.

[0035] Similarly, when the FB detection unit detects that the voltage value of the electrical signal output by the FB MIC is greater than the specified value, the signal processing module generates and outputs an adjustment signal, and the adjustment signal is sent to the first FB filter to reduce the gain stored in the first FB filter. Since the gain of the first FB filter is reduced, when the first FB filter filters and reduces the noise of the electrical signal output by the FB MIC, a noise-reduced electrical signal can be obtained instead of a noise-enhanced electrical signal. Therefore, the speaker unit finally outputs a noise-reduced sound signal instead of a noise-enhanced sound signal.

[0036] It is understandable that when the FF detection unit detects that the voltage value of the electrical signal output by the FF MIC is not greater than the specified value, the first FF filter can be directly used to filter and reduce the noise of the electrical signal output by the FF MIC, without affecting the normal noise reduction function of the earphone. Similarly, when the FB detection unit detects that the voltage value of the electrical signal output by the FB MIC is not greater than the specified value, the first FB filter can be directly used to filter and reduce the noise of the electrical signal output by the FB MIC.

[0037] In some embodiments, when the voltage value is greater than a specified value, the electrical signal output by the microphone module can also be filtered using at least one of the second FF filter and the second FB filter, and then input into at least one of the second FF filter and the second FB filter for noise reduction filtering, which is beneficial to further improve the noise reduction effect.

[0038] It should be noted that the voltage comparison method involved in the embodiment of the present application is based on the data processing level of the prior art. The embodiment of the present application does not involve the data processing method and any software improvements. What is protected is the specific module connection relationship formed between the modules and the entire noise reduction headphones based on the module connection relationship.

[0039] An embodiment of the present application also provides an earphone device, including the noise-cancelling earphones mentioned above with a charging box, and the noise-cancelling earphones can be charged through the charging box.

[0040] The above is a specific description of the preferred implementation of the utility model, but the utility model is not limited to the implementation method. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A noise-cancelling headset, characterized in that: include: A microphone module, used to collect sound signals and convert them into electrical signals; An active noise reduction module, comprising a voltage detection unit, a filter unit and a speaker unit, wherein the voltage detection unit is used to detect the voltage value of the electrical signal, the voltage detection unit is connected to the microphone module and the filter unit, and the filter unit is connected to the speaker unit; A signal processing module is connected to the voltage detection unit and the filter unit, and is used to receive the voltage value and output an adjustment signal, wherein the adjustment signal is used to reduce the gain of the filter unit when the voltage value is greater than a specified value.

2. The noise-cancelling earphone according to claim 1, characterized in that: The speaker unit includes a processing unit and a speaker, and the processing unit is connected to the speaker and the filter unit.

3. The noise-cancelling earphone according to claim 1, characterized in that: The microphone module includes an FFMIC, the filter unit includes a first FF filter, and the voltage detection unit is connected to the FFMIC, the first FF filter, and the signal processing module.

4. The noise-cancelling earphone according to claim 1, characterized in that: The microphone module includes an FBMIC, the filter unit includes a first FB filter, and the voltage detection unit is connected to the FBMIC, the first FB filter, and the signal processing module.

5. The noise-cancelling earphone according to claim 1, characterized in that: The signal processing module includes a filter unit and a processor, the filter unit is connected to the processor and the voltage detection unit, and the processor is connected to the filter unit.

6. The noise-cancelling earphone according to claim 5, characterized in that: The filtering unit includes a second FF filter and a second FB filter.

7. The noise-cancelling earphone according to claim 1, characterized in that: The voltage detection unit includes an FF detection unit and an FB detection unit, the microphone module includes FFMIC and FBMIC, and the filter unit includes a first FF filter and a first FB filter; the FF detection unit is connected to the first FF filter and the signal processing module, the FB detection unit is connected to the first FB filter and the signal processing module, the first FF filter is connected to the speaker unit, and the first FB filter is connected to the speaker unit.

8. The noise-cancelling earphone according to claim 7, characterized in that: The speaker unit includes a processing unit and a speaker, and the processing unit is connected to the speaker, the first FF filter and the first FB filter.

9. The noise-cancelling earphone according to claim 1, characterized in that: The signal processing module is a DSP module.

10. An earphone device, characterized in that: It comprises a charging box and the noise-cancelling earphones as described in any one of claims 1 to 9.

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