Active noise reduction earphone

Abstract

The utility model discloses an active noise reduction earphone, which utilizes a first noise reduction module to capture external environment noise and perform active noise reduction processing, and utilizes a second noise reduction module to capture noisy human voice and actively process the external environment noise in the noisy human voice to obtain clean human voice. The active noise reduction earphone has a better noise reduction effect, can keep human voice clean during communication, and improves call definition.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction, in particular to an active noise reduction earphone. Background Art

[0002] Aviation operations refer to the use of civil aircraft to engage in civil aviation activities other than public air transport, including operational flights in industry, agriculture, forestry, fishery and construction, as well as flight activities in the fields of medical care, disaster relief, meteorological detection, ocean monitoring, scientific experiments, education and training, culture and sports.

[0003] During aviation operations, the ambient noise inside the aircraft is very loud, especially in helicopters. Communication between staff members is done through headsets, and existing headsets only use sound insulation materials for passive noise reduction. This method still causes a certain amount of ambient noise, which affects the communication effect between staff members. Utility Model Content

[0004] The purpose of the utility model is to provide an active noise reduction headset in view of the technical problems existing in the background technology.

[0005] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0006] An active noise reduction headset comprises a headband, two earmuffs, and a microphone and a communication module installed on one of the earmuffs. The headset is characterized in that it also comprises a first noise reduction module and a second noise reduction module respectively installed in the two earmuffs, the second noise reduction module is electrically connected to the microphone and the communication module respectively, the first noise reduction module comprises a first active noise reduction chip, a first collection microphone and a speaker electrically connected to each other, wherein the first collection microphone processes the collected external environmental noise through the first active noise reduction chip to obtain anti-noise, and plays the anti-noise through the speaker to perform noise reduction processing on the external environmental noise, the second noise reduction module comprises a second active noise reduction chip and a second collection microphone electrically connected to each other, wherein the second active noise reduction chip processes the noisy human voice collected by the microphone and the external environmental noise collected by the second collection microphone to obtain a clean human voice, wherein the communication module obtains the clean human voice for communication.

[0007] Preferably, the active noise reduction headset further comprises a controller installed in the earmuff, and the controller is electrically connected to the second noise reduction module to actively control the start and stop of the second noise reduction module.

[0008] Preferably, the first active noise reduction chip includes an ADAU1860 chip.

[0009] Preferably, the second active noise reduction chip includes a CM7001N chip.

[0010] Preferably, the microphone comprises a noise cancelling microphone.

[0011] Preferably, the earmuffs are provided with sound insulation cotton.

[0012] Compared with the prior art, the utility model has the following beneficial technical effects: the first noise reduction module is used to capture external environmental noise and perform active noise reduction processing, and the second noise reduction module is used to capture noisy human voices and actively process the external environmental noise in the noisy human voices to obtain clean human voices. Compared with earphones that are only provided with sound insulation materials, the active noise reduction earphones have a better noise reduction effect, and can also keep the human voice clean during communication, thereby improving call clarity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0014] Figure 2 The figure is a schematic diagram of the noise reduction process of an embodiment of the utility model.

[0015] Figure numbers: 100 headband, 101 earmuffs, 102 microphone, 103 communication module, 200 first noise reduction module, 104 sound insulation cotton, 201 first active noise reduction chip, 202 first collection microphone, 203 speaker, 300 second noise reduction module, 301 second active noise reduction chip, 302 second collection microphone, 400 controller. DETAILED DESCRIPTION

[0016] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0017] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a specific connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0019] The specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0020] like Figure 1-Figure 2 As shown, the utility model provides an active noise reduction headset, which includes a headband 100, two earmuffs 101, and a microphone 102 and a communication module 103 installed on one of the earmuffs 101, and also includes a first noise reduction module 200 and a second noise reduction module 300 respectively installed in the two earmuffs 101, the second noise reduction module 300 is electrically connected to the microphone 102 and the communication module 103 respectively, the first noise reduction module 200 includes a first active noise reduction chip 201, a first collection microphone 202 and a speaker 203 electrically connected to each other, wherein the first collection microphone The wind 202 processes the collected external environmental noise through the first active noise reduction chip 201 to obtain anti-noise, and plays the anti-noise through the speaker 203 to reduce the external environmental noise. The second noise reduction module 300 includes a second active noise reduction chip 301 and a second collection microphone 302 that are electrically connected to each other, wherein the second active noise reduction chip 301 processes the noisy human voice collected by the microphone 102 and the external environmental noise collected by the second collection microphone 302 to obtain a clean human voice; wherein the communication module 103 obtains the clean human voice for communication.

[0021] The specific implementation method is as follows: when the active noise reduction headset is worn and started, the first noise reduction module 200 is automatically enabled, the external environmental noise is captured by the first collection microphone 202, and the external environmental noise is processed by the first active noise reduction chip 201 to obtain the corresponding anti-noise, and the speaker 203 plays the anti-noise externally to offset the external environmental noise, thereby achieving the noise reduction effect. During communication, the microphone acquires the human voice while also acquiring the external environmental noise, and the two are combined to obtain a noisy human voice. In order to offset the external environmental noise in the noisy human voice separately, it is necessary to use the second collection microphone 302 to collect the external environmental noise, and the second active noise reduction chip 301 uses the external environmental noise collected by the second collection microphone 302 as a sample to perform noise reduction processing on the noisy human voice. It should be noted that the external environmental noise collected by the first collection microphone 202 cannot be used by the second active noise reduction chip 301. The reason is that the two collected sound positions are different, and there will be a certain noise error. This is prone to some noise frequency bands not being processed cleanly during the subsequent noise reduction processing, resulting in poor noise reduction effect.

[0022] Furthermore, the active noise reduction headset also includes a controller 400 installed in the earmuff 101 , and the controller 400 is electrically connected to the second noise reduction module 300 to actively control the start and stop of the second noise reduction module 300 .

[0023] Specifically, since the energy consumption of noise reduction work is relatively high, the controller 400 will turn off the use of the second noise reduction module 300 when it is not in a communication state, wherein the controller 400 is set for manual operation and / or automatic program control, and the user or program determines whether it is currently in a communication state to control the start and stop of the second noise reduction module 300.

[0024] Furthermore, the first active noise reduction chip 201 includes an ADAU1860 chip.

[0025] Specifically, the ADAU1860 chip is a codec with three inputs and one output, which integrates two digital signal processors (DSPs). The path from analog input to DSP core and then to analog output has been optimized to achieve low latency, effectively ensuring the noise reduction process and noise reduction effect.

[0026] Furthermore, the second active noise reduction chip 301 includes a CM7001N chip.

[0027] Specifically, the CM7001N chip is an enhanced universal voice tool that provides closed call environment noise elimination, long-distance intelligent voice capture, and excellent voice. At the same time, like the above-mentioned ADAU1860 chip, it is a cost-effective chip that can ensure that the active noise-cancelling headphones have good noise reduction functions while controlling low production costs.

[0028] Furthermore, the microphone 102 includes a noise-cancelling microphone, and a sound-isolating cotton 104 is provided on the earmuff.

[0029] The above are one or more implementation methods provided in combination with specific content, and it is not intended that the specific implementation of the utility model is limited to these descriptions. Any method, structure, etc. similar to or identical to the method, structure, etc. of the utility model, or any technical deduction or replacement based on the concept of the utility model, shall be deemed to be within the protection scope of the utility model.

Claims

1. An active noise reduction headset, comprising a headband (100), two earmuffs (101), and a microphone (102) and a communication module (103) mounted on one of the earmuffs (101), characterized in that: It also includes a first noise reduction module (200) and a second noise reduction module (300) respectively installed in the two earmuffs (101), and the second noise reduction module (300) is electrically connected to the microphone (102) and the communication module (103) respectively; The first noise reduction module (200) comprises a first active noise reduction chip (201), a first collection microphone (202) and a loudspeaker (203) which are electrically connected to each other, wherein the first collection microphone (202) processes the collected external environmental noise through the first active noise reduction chip (201) to obtain anti-noise, and plays the anti-noise through the loudspeaker (203) to perform noise reduction processing on the external environmental noise; The second noise reduction module (300) comprises a second active noise reduction chip (301) and a second collection microphone (302) which are electrically connected to each other, wherein the second active noise reduction chip (301) processes noisy human voices collected by the microphone (102) and external environmental noise collected by the second collection microphone (302) to obtain clean human voices; Wherein, the communication module (103) obtains the clean human voice for communication.

2. The active noise reduction headset according to claim 1, characterized in that: It also includes a controller (400) installed in the earmuff (101), and the controller (400) is electrically connected to the second noise reduction module (300) to actively control the start and stop of the second noise reduction module (300).

3. The active noise reduction headset according to claim 1, characterized in that: The first active noise reduction chip (201) comprises an ADAU1860 chip.

4. The active noise reduction headset according to claim 1, characterized in that: The second active noise reduction chip (301) comprises a CM7001N chip.

5. The active noise reduction headset according to claim 1, characterized in that: The microphone (102) comprises a noise cancelling microphone.

6. The active noise reduction headset according to claim 1, characterized in that: The earmuff is provided with sound insulation cotton (104).

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