Noise reduction earphone

Abstract

The utility model discloses a noise reduction earphone, comprising a microphone with a sound inlet channel, and the microphone is arranged at the outlet of the sound inlet channel; the noise reduction earphone further comprises double-layer screen cloth, and the fabric air permeability of the double-layer screen cloth is 100-700 mm / s. The double-layer net cloth is arranged on a sound inlet channel of a microphone of the noise reduction earphone and is used for attenuating an ultrahigh frequency sound signal in the sound inlet channel of the microphone. According to the utility model, the ultra-high frequency harmonic peak sensitivity of the microphone can be reduced, unnecessary noise can be reduced, and the sensitivity to signals in other frequency ranges can be maintained, so that the pickup effect can be improved.

Description

Technical Field

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

[0002] TWS (True Wireless Stereo) wireless noise-canceling headphones have a noise-canceling function and are also designed with a Transparency Mode. Transparency Mode allows external sounds to enter the headphones, allowing you to hear the surrounding environmental sounds. It is very useful for communicating with others or in scenarios where you need to pay attention to safety, such as when walking, working, or needing to communicate with others.

[0003] However, the transparent design has a drawback: the impact sound of dropped metal can cause pop noise in transparent mode. This pop noise is caused by the inherent resonance peak of the microphone (MIC). When the frequency of the external forcing force approaches the natural frequency of the microphone's vibration system, the microphone's vibration becomes particularly intense, reaching its maximum amplitude and causing resonance. This resonance is the cause of the pop noise.

[0004] Through investigation, it was found that the transparency mode of noise-canceling headphones from major brands on the market all have POP noise in the above situations. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a noise reduction headset, which can reduce the resonance peak sensitivity of the microphone at ultra-high frequencies and reduce unnecessary noise.

[0006] In order to solve the above technical problems, the utility model discloses a noise reduction headset, comprising a microphone with a sound input channel, wherein the microphone is arranged at the outlet of the sound input channel;

[0007] It also includes a double-layer mesh cloth, the air permeability of which is 100 to 700 mm / s; the double-layer mesh cloth is arranged on the sound input channel of the microphone of the noise-canceling headset to attenuate the ultra-high frequency sound signal in the sound input channel of the microphone.

[0008] As an optional implementation, the sound inlet channel is a channel that connects the inner cavity of the noise-canceling earphone to the outside through the shell of the noise-canceling earphone.

[0009] As another optional embodiment, the sound inlet channel is covered by the circuit board of the noise-canceling earphone at the outlet of the inner cavity of the noise-canceling earphone, and the circuit board is provided with a through hole at the outlet of the sound inlet channel; the microphone is mounted on the circuit board, and the sound receiving hole of the microphone is connected to the sound inlet channel through the through hole.

[0010] As another optional implementation, the double-layer mesh cloth is placed at the outlet of the sound inlet channel and is covered by the circuit board.

[0011] As another optional implementation, the frequency of the ultra-high frequency sound signal is 20-40 KHz.

[0012] As another optional embodiment, the double-layer mesh is a double-layer nylon mesh.

[0013] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0014] The embodiment of the present invention reduces the resonance peak sensitivity of the microphone at ultra-high frequencies (20-40 kHz) by providing a double layer of mesh cloth, thereby reducing unnecessary POP noise while maintaining sensitivity to signals within other frequency ranges and improving the sound pickup effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a structural diagram of a noise-canceling headset disclosed in an embodiment of the present utility model;

[0017] Figure 2 The utility model disclosed in the embodiment Figure 1 A magnified schematic diagram of part A in the middle;

[0018] Figure 3 This is another structural schematic diagram of a noise-canceling headset disclosed in an embodiment of the present utility model. DETAILED DESCRIPTION

[0019] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0020] See also Figures 1 to 3An embodiment of the present invention discloses a noise-canceling headset, comprising a microphone 1 having a sound input channel 2, wherein the microphone 1 is arranged at the outlet of the sound input channel 2; and further comprising a double-layer mesh cloth 3, wherein the air permeability of the double-layer mesh cloth 3 is 100 to 700 mm / s; the double-layer mesh cloth 3 is arranged on the sound input channel 2 of the microphone 1 of the noise-canceling headset, and is used to attenuate ultra-high frequency sound signals in the sound input channel 2 of the microphone 1.

[0021] Existing noise-canceling headphones usually have a single layer of mesh on the sound input channel 2 of the microphone 1, mainly for waterproofing and dustproofing. According to the characteristics of the mesh material, the mesh material has an attenuation effect on audio signals, and the attenuation effect on ultra-high frequency signals is greater than that on low-frequency signals. However, according to existing surveys and experiments, the single layer of mesh in existing noise-canceling headphones cannot suppress POP noise.

[0022] Because the sensitivity of microphone 1 (MIC)'s resonance peak at 27-30 kHz is over 20dB higher than its sensitivity at 1 kHz, the double-layer mesh 3 is designed to reduce the sensitivity of microphone 1's resonance peak at ultra-high frequencies (20-40 kHz). This reduces the pop-up noise problem that occurs in transparent mode. At the same time, this design provides relatively little attenuation for microphone 1 in the frequency range of 20-8000 Hz, meaning it won't significantly affect microphone 1's sound pickup performance within this frequency range (i.e., the low-frequency range). Using a single-layer mesh with a higher density would also control the high-frequency resonance peak, but it would also result in excessive attenuation of the low frequencies.

[0023] In this regard, the embodiment of the present invention reduces the resonance peak sensitivity of the microphone 1 at ultra-high frequencies (20-40 kHz) by providing a double-layer mesh 3, thereby reducing unnecessary POP noise while maintaining sensitivity to signals within other frequency ranges and improving the sound pickup effect.

[0024] In an optional embodiment, the sound inlet channel 2 is a channel that connects the inner cavity of the noise-canceling earphone to the outside through the outer shell 4 of the noise-canceling earphone.

[0025] In another optional embodiment, the sound input channel 2 is covered by the circuit board 5 of the noise-canceling earphone at the outlet of the inner cavity of the noise-canceling earphone, and the circuit board 5 is provided with a through hole at the outlet of the sound input channel 2; the microphone 1 is installed on the circuit board 5, and the sound receiving hole of the microphone 1 is connected to the sound input channel 2 through the through hole.

[0026] In another optional embodiment, the double-layer mesh cloth 3 is placed at the outlet of the sound inlet channel 2 and is covered by the circuit board 5 .

[0027] In yet another optional embodiment, the frequency of the ultra-high frequency sound signal is 20-40 KHz.

[0028] In another optional embodiment, the double-layer mesh 3 is a double-layer nylon mesh.

[0029] The contents disclosed in the embodiments of the present invention only disclose preferred embodiments of the present invention, which are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A noise-canceling headset comprising a microphone having a sound inlet channel, wherein the microphone is disposed at an outlet of the sound inlet channel; It is characterized in that It also includes a double-layer mesh cloth, the air permeability of which is 100 to 700 mm / s; the double-layer mesh cloth is arranged on the sound input channel of the microphone of the noise-canceling headset to attenuate the ultra-high frequency sound signal in the sound input channel of the microphone.

2. The noise-canceling headphones according to claim 1, wherein: The sound inlet channel is a channel that connects the inner cavity of the noise-canceling earphone to the outside through the outer shell of the noise-canceling earphone.

3. The noise-canceling headphones according to claim 2, wherein: The sound inlet channel is covered by the circuit board of the noise-canceling earphone at the outlet of the inner cavity of the noise-canceling earphone, and the circuit board is provided with a through hole at the outlet of the sound inlet channel; the microphone is installed on the circuit board, and the sound receiving hole of the microphone is connected to the sound inlet channel through the through hole.

4. The noise-canceling headphones according to claim 3, wherein: The double-layer mesh cloth is placed at the outlet of the sound inlet channel and is covered by the circuit board.

5. The noise-canceling headphones according to claim 1, wherein: The frequency of the ultra-high frequency sound signal is 20-40 KHz.

6. The noise-canceling headphones according to claim 1, wherein: The double-layer mesh is a double-layer nylon mesh.

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