An earphone circuit integrated with a DSP
By integrating a DSP module into the headphone circuit, the problems of unadjustable frequency response curves and insufficient anti-interference capabilities of monitoring headphones are solved, enabling personalized sound effect adjustment and environmental noise cancellation, thus improving the accuracy and clarity of monitoring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN CITY SENMAI ELECTRON LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-08-04
AI Technical Summary
The frequency response curve of monitoring headphones cannot be adjusted as needed and has poor anti-interference ability, which affects the accuracy of monitoring.
A DSP module is integrated into the headphone circuit to achieve real-time processing and analysis of audio signals, and to perform precise adjustment of frequency response and noise cancellation through the DSP module.
It enables personalized sound effect adjustments and ambient noise cancellation for monitoring headphones, improving the accuracy and clarity of monitoring.
Smart Images
Figure CN224596590U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of audio equipment technology, and in particular relates to a headphone circuit with integrated DSP. Background Technology
[0002] Monitoring headphones are headphones designed for professional audio scenarios such as recording studios, radio stations, and stage performances. Their core function is to accurately reproduce the true details of sound, helping audio professionals to accurately judge the sound quality, pitch, dynamic range, and balance of each frequency band.
[0003] While monitoring headphones offer advantages in sound reproduction, their traditional dynamic / balanced armature driver structures result in fixed frequency response characteristics, meaning the frequency response curve cannot be adjusted as needed. Stage monitoring scenarios require enhanced low frequencies, while recording studios demand full-frequency balance, necessitating the purchase of multiple sets of equipment to suit different usage scenarios. Furthermore, conventional monitoring headphones have weak environmental interference resistance; while physical sound isolation can reduce noise, it cannot dynamically suppress sudden environmental noises such as audience noise in performance venues, affecting monitoring accuracy.
[0004] Therefore, it is necessary to improve existing technologies to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide an integrated DSP headphone circuit, which aims to solve the technical problems of the inability to adjust the frequency response curve and poor anti-interference capability of existing monitoring headphones.
[0006] To achieve the above objectives, this utility model provides an integrated DSP headphone circuit, comprising:
[0007] An audio input module is used to connect to external audio signals;
[0008] An analog-to-digital converter module is connected to the audio input module and is used to convert external audio signals into digital electrical signals;
[0009] The DSP module, connected to the audio input module and the analog-to-digital converter module, is used to process and adjust the digital electrical signal and convert it into an analog electrical signal;
[0010] A speaker module, connected to the DSP module, is used to convert the analog electrical signal into sound output;
[0011] A power supply module, which is connected to the analog-to-digital converter module and the DSP module.
[0012] As a preferred embodiment, the DSP module includes a DSP chip, and the audio input module includes an AUX interface, with the second pin of the AUX interface connected to the tenth pin of the DSP chip.
[0013] As a preferred embodiment, the analog-to-digital conversion module includes an analog-to-digital conversion chip. The seventh pin of the analog-to-digital conversion chip is connected to the sixth pin of the AUX interface, the fourteenth pin of the analog-to-digital conversion chip is connected to the third pin of the AUX interface, the second pin of the analog-to-digital conversion chip is connected to the twenty-sixth pin of the DSP chip, the third pin of the analog-to-digital conversion chip is connected to the twenty-fifth pin of the DSP chip, the sixteenth pin of the analog-to-digital conversion chip is connected to the seventeenth pin of the DSP chip, and the fifteenth pin of the analog-to-digital conversion chip is connected to the eighteenth pin of the DSP chip.
[0014] As a preferred embodiment, the speaker module includes a left channel unit and a right channel unit, wherein the left channel unit is connected to the fourth and third pins of the DSP chip, and the right channel unit is connected to the second and first pins of the DSP chip.
[0015] As a preferred embodiment, the power supply module includes a battery and a first step-down chip; the fourth pin of the first step-down chip is connected to the positive terminal of the battery, the third pin of the first step-down chip is connected to the fifth pin of the DSP chip, and the first pin of the first step-down chip is connected to the twenty-fourth pin of the DSP chip.
[0016] As a preferred embodiment, the power supply module further includes a second step-down chip, the fourth pin of which is connected to the positive terminal of the battery, the third pin of which is connected to the eleventh pin of the analog-to-digital converter chip, and the first pin of which is connected to the sixth pin of the DSP chip.
[0017] As a preferred embodiment, the system also includes a charging module, which includes a charging interface and a charging management chip. The charging interface is connected to the DSP module, and the charging management chip is connected to the charging interface, the power supply module, and the DSP module.
[0018] As a preferred embodiment, the charging module further includes an overcurrent protection chip, the third pin of which is connected to the B4 pin of the charging interface, and the fourth pin of which is connected to the fourth pin of the charging management chip.
[0019] As a preferred embodiment, the system also includes a button module, which includes a power button, a first volume button, and a second volume button, all of which are connected to the DSP module.
[0020] As a preferred embodiment, the system also includes an indicator light module, which includes a first LED and a second LED. The negative terminal of the second LED is connected to the positive terminal of the first LED, and the positive terminal of the second LED is connected to the fifteenth pin of the DSP chip. The positive terminals of the first LED and the negative terminals of the second LED are both connected to the thirty-second pin of the DSP chip.
[0021] The above-mentioned technical solutions in the headphone circuit with integrated DSP provided in this embodiment of the utility model have at least one of the following technical effects:
[0022] This solution incorporates a DSP module into the monitoring headphone circuitry, enabling real-time display of audio signal analysis results, such as spectrum diagrams and level meters. Users can adjust DSP parameters promptly based on this real-time feedback, achieving precise control and optimization of the sound. Simultaneously, it can analyze the frequency and characteristics of ambient noise in real time and generate inverse sound waves to cancel out the noise, allowing users to hear the audio content more clearly. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 The overall structural block diagram provided for the embodiments of this utility model;
[0025] Figure 2 Circuit schematic diagram of the audio input module provided in this embodiment of the utility model;
[0026] Figure 3 Circuit schematic diagram of the analog-to-digital converter module provided in this embodiment of the utility model;
[0027] Figure 4 The circuit schematic diagram of the DSP module provided in the embodiment of this utility model;
[0028] Figure 5 A circuit diagram of a speaker module provided for an embodiment of this utility model;
[0029] Figure 6 Circuit diagram of the power supply module provided in this embodiment of the utility model;
[0030] Figure 7 A circuit diagram of the charging module provided for an embodiment of this utility model;
[0031] Figure 8The circuit diagram of the button module provided in this embodiment of the utility model;
[0032] Figure 9 The circuit diagram of the indicator module provided in this embodiment of the utility model;
[0033] The following are the labeling elements in the figure:
[0034] 100 - Audio input module; 200 - Analog-to-digital converter module; 300 - DSP module; 400 - Speaker module; 500 - Power supply module; 600 - Charging module; 700 - Button module; 800 - Indicator light module. Detailed Implementation
[0035] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.
[0036] In the description of the embodiments of this utility model, 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 drawings. They are only for the convenience of describing the embodiments of this utility model 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 utility model.
[0037] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0038] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.
[0039] In one embodiment of this utility model, such as Figures 1-9 As shown, an integrated DSP headphone circuit is provided, including an audio input module 100, an analog-to-digital converter module 200, a DSP module 300, a speaker module 400, a power supply module 500, a charging module 600, a button module 700, and an indicator light module 800.
[0040] The audio input module 100 is used to receive external audio signals. In this embodiment, the audio input module 100 includes an AUX interface J2 to enable high-fidelity input of external audio signals.
[0041] The analog-to-digital converter (ADC) module 200 is connected to the audio input module 100 and is used to convert external audio signals into digital electrical signals. The ADC module 200 includes an ADC chip U4, the seventh pin of which is connected to the sixth pin of the AUX interface J2, and the fourteenth pin of which is connected to the third pin of the AUX interface J2. In this embodiment, the ADC chip U4 is preferably an ES7202 or another chip of the same type.
[0042] The DSP module 300 is connected to the audio input module 100 and the analog-to-digital converter module 200, and is used to process and adjust the digital electrical signal and convert it into an analog electrical signal.
[0043] The DSP module 300 allows for precise adjustment of the audio signal, enabling users to accurately adjust the frequency response of the audio signal received by the monitoring headphones to meet different monitoring needs. It also allows for fine-tuning of the overall audio balance to ensure that the sound in each frequency band is accurately reproduced.
[0044] Meanwhile, different users have different preferences and needs for sound. The DSP module 300 allows users to create personalized sound effect presets based on their hearing characteristics, music type, or work scenario, so as to better grasp the overall effect of the music.
[0045] Furthermore, the DSP module 300 can display the analysis results of the audio signal in real time, such as spectrograms and level meters. Users can adjust the DSP parameters in a timely manner based on this real-time feedback information to achieve precise control and optimization of the sound.
[0046] Furthermore, the DSP module 300 can analyze the frequency and characteristics of ambient noise in real time and generate inverse sound waves to cancel out the noise. This is crucial for personnel conducting monitoring work in noisy environments, allowing users to hear audio content more clearly.
[0047] In one embodiment of this utility model, the DSP module 300 includes a DSP chip U1. The tenth pin of the DSP chip U1 is connected to the second pin of the AUX interface J2, the twenty-sixth pin of the DSP chip U1 is connected to the second pin of the analog-to-digital converter chip U4, the twenty-fifth pin of the DSP chip U1 is connected to the third pin of the analog-to-digital converter chip U4, the seventeenth pin of the DSP chip U1 is connected to the sixteenth pin of the analog-to-digital converter chip U4, and the eighteenth pin of the DSP chip U1 is connected to the fifteenth pin of the analog-to-digital converter chip U4. In this embodiment, the DSP chip U1 is preferably of model JL7018F, or another chip of the same type.
[0048] The speaker module 400 is connected to the DSP module 300 and is used to convert the analog electrical signal into sound output. The speaker module 400 includes a left channel unit and a right channel unit. The left channel unit is connected to the fourth and third pins of the DSP chip U1, and the right channel unit is connected to the second and first pins of the DSP chip U1.
[0049] The power supply module 500 connects the analog-to-digital converter module 200 and the DSP module 300. The power supply module 500 includes a battery BT1, a first step-down chip U3, and a second step-down chip U6. The battery BT1 includes a positive terminal B+, a negative terminal B-, and a temperature sensing terminal NTC. The fourth pin of the first step-down chip U3 is connected to the positive terminal B+ of the battery BT1, the third pin of the first step-down chip U3 is connected to the fifth pin of the DSP chip U1, and the first pin of the first step-down chip U3 is connected to the twenty-fourth pin of the DSP chip U1. The fourth pin of the second step-down chip U6 is connected to the positive terminal B+ of the battery BT1, the third pin of the second step-down chip U6 is connected to the eleventh pin of the analog-to-digital converter chip U4, and the first pin of the second step-down chip U6 is connected to the sixth pin of the DSP chip U1. In this embodiment, the first step-down chip U3 and the second step-down chip U6 are preferably of the TMI3101 type, or other chips of the same type.
[0050] The charging module 600 includes a charging interface J1, a charging management chip U5, and an overcurrent protection chip U2. The charging interface J1 is connected to the DSP module 300. The charging management chip U5 is connected to the charging interface J1, the power supply module 500, and the DSP module 300. The overcurrent protection chip U2 is connected to the charging interface J1 and the charging management chip U5. Specifically, the charging interface J1 is a Type-C interface; the third pin of the overcurrent protection chip U2 is connected to the B4 pin of the charging interface J1, and the fourth pin of the overcurrent protection chip U2 is connected to the fourth pin of the charging management chip U5; the first pin of the charging management chip U5 is connected to the NTC temperature sensor of the battery BT1, the fifth pin of the charging management chip U5 is connected to the positive terminal B+ of the battery BT1, and the seventh pin of the charging management chip U5 is connected to the thirty-first pin of the DSP chip U1. In this embodiment, the charging management chip U5 is preferably CL4056D or other chips of the same type; the overcurrent protection chip U2 is preferably P14C1S or other chips of the same type.
[0051] The button module 700 includes a power button S1, a first volume button S2, and a second volume button S3. The power button S1, the first volume button S2, and the second volume button S3 are all connected to the corresponding pins of the DSP module 300.
[0052] The indicator module 800 includes a first LED 2 and a second LED 1. The negative terminal of the second LED 1 is connected to the positive terminal of the first LED 2. The positive terminal of the second LED 1 is connected to the fifteenth pin of the DSP chip U1. The positive terminals of the first LED 2 and the negative terminals of the second LED 1 are both connected to the thirty-second pin of the DSP chip U1.
[0053] This solution, by incorporating the DSP module 300 into the monitoring headphone circuit, can display real-time audio signal analysis results, such as spectrum diagrams and level meters. Users can adjust DSP parameters promptly based on this real-time feedback, achieving precise control and optimization of the sound. Simultaneously, it can analyze the frequency and characteristics of ambient noise in real time and generate inverse sound waves to cancel out noise, allowing users to hear the audio content more clearly.
[0054] It should be noted that the chip provided in this application is only an example, and those skilled in the art can choose other chips as needed.
[0055] It should be noted that this application aims to protect the circuit structure. As for the program control part, those skilled in the art should select appropriate circuits and chips according to the chip models in this application or as needed and program them appropriately to realize the corresponding program control function in this utility model. Therefore, some of them are mature and established technologies in the prior art and are not the focus of protection in this application. Therefore, this application will not elaborate on this control part.
[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A headphone circuit integrating a DSP, characterized in that, include: An audio input module is used to connect to external audio signals; An analog-to-digital converter module is connected to the audio input module and is used to convert external audio signals into digital electrical signals; The DSP module, connected to the audio input module and the analog-to-digital converter module, is used to process and adjust the digital electrical signal and convert it into an analog electrical signal; A speaker module, connected to the DSP module, is used to convert the analog electrical signal into sound output; A power supply module, which is connected to the analog-to-digital converter module and the DSP module.
2. The headphone circuit with integrated DSP according to claim 1, characterized in that, The DSP module includes a DSP chip, and the audio input module includes an AUX interface, with the second pin of the AUX interface connected to the tenth pin of the DSP chip.
3. The headphone circuit with integrated DSP according to claim 2, characterized in that, The analog-to-digital conversion module includes an analog-to-digital conversion chip. The seventh pin of the analog-to-digital conversion chip is connected to the sixth pin of the AUX interface, the fourteenth pin of the analog-to-digital conversion chip is connected to the third pin of the AUX interface, the second pin of the analog-to-digital conversion chip is connected to the twenty-sixth pin of the DSP chip, the third pin of the analog-to-digital conversion chip is connected to the twenty-fifth pin of the DSP chip, the sixteenth pin of the analog-to-digital conversion chip is connected to the seventeenth pin of the DSP chip, and the fifteenth pin of the analog-to-digital conversion chip is connected to the eighteenth pin of the DSP chip.
4. The headphone circuit with integrated DSP according to claim 2, characterized in that, The speaker module includes a left channel unit and a right channel unit. The left channel unit is connected to the fourth and third pins of the DSP chip, and the right channel unit is connected to the second and first pins of the DSP chip.
5. The headphone circuit with integrated DSP according to claim 3, characterized in that, The power supply module includes a battery and a first step-down chip; the fourth pin of the first step-down chip is connected to the positive terminal of the battery, the third pin of the first step-down chip is connected to the fifth pin of the DSP chip, and the first pin of the first step-down chip is connected to the twenty-fourth pin of the DSP chip.
6. The headphone circuit with integrated DSP according to claim 5, characterized in that, The power supply module also includes a second step-down chip, the fourth pin of which is connected to the positive terminal of the battery, the third pin of which is connected to the eleventh pin of the analog-to-digital converter chip, and the first pin of which is connected to the sixth pin of the DSP chip.
7. A headphone circuit with an integrated DSP according to any one of claims 1-6, characterized in that, It also includes a charging module, which includes a charging interface and a charging management chip. The charging interface is connected to the DSP module, and the charging management chip is connected to the charging interface, the power supply module, and the DSP module.
8. The headphone circuit with integrated DSP according to claim 7, characterized in that, The charging module also includes an overcurrent protection chip, the third pin of which is connected to the B4 pin of the charging interface, and the fourth pin of which is connected to the fourth pin of the charging management chip.
9. A headphone circuit with an integrated DSP according to any one of claims 1-6, characterized in that, It also includes a button module, which includes a power button, a first volume button, and a second volume button. The power button, the first volume button, and the second volume button are all connected to the DSP module.
10. A headphone circuit with an integrated DSP according to any one of claims 2-6, characterized in that, It also includes an indicator light module, which includes a first LED and a second LED. The negative terminal of the second LED is connected to the positive terminal of the first LED, and the positive terminal of the second LED is connected to the fifteenth pin of the DSP chip. The positive terminal of the first LED and the negative terminal of the second LED are both connected to the thirty-second pin of the DSP chip.