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Sound compensation method and system and earphone

A compensation method and sound technology, applied in earpiece/earphone accessories, earphones to reduce environmental noise, loudspeakers, etc., can solve the problem that the environmental sound cannot be accurately reproduced, and achieve the effects of easy implementation, overcoming the limitation of sound production, and a simple method

Inactive Publication Date: 2018-11-06
HUITING ACOUSTICS TECH BEIJING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned problems, the present invention proposes a sound compensation method, system and earphones to solve the problem that the ambient sound cannot be accurately reproduced

Method used

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  • Sound compensation method and system and earphone
  • Sound compensation method and system and earphone
  • Sound compensation method and system and earphone

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown in the flow chart of the steps of the sound compensation method, an embodiment of the present invention provides a sound compensation method, including the following steps:

[0038] S100: Determine the first acoustic characteristic transfer function P from the sound pickup point to the sound compensation point 0 and the second acoustic characteristic transfer function P 1 ;

[0039] S200: Determine the third sound characteristic transfer function S from the sound generation place to the sound compensation place;

[0040] S300: According to the first acoustic characteristic transfer function P 0 , the second acoustic characteristic transfer function P 1 As well as a third acoustic characteristic transfer function S, an acoustic compensation filter transfer function H is determined.

[0041] In one embodiment, as figure 2 The schematic block diagram of the sound compensation is shown, figure 2 The middle (a) indicates that in the state o...

Embodiment 2

[0057] An embodiment of the present invention provides a sound compensation method. In this method, the ear protection device is set as an active noise reduction earphone, and the sound pickup point is determined to be a position between the sound source and the simulated human head, and the sound compensation point is the simulated human head. in the ear canal. When the simulated human head is wearing active noise-cancelling headphones, determine the position of the feed-forward microphone as the sound pickup position, the position of the speaker as the sounding position, and the position where the ear canal of the simulated human head is close to the eardrum as the sound compensation position, and use the sound source to send out sound signals , respectively measure the sound signal x at the pick-up point 3 Acoustic signal at acoustic compensation x 4 , and based on x 3 and x 4 Determining the second acoustic transfer function P by using the least squares identification m...

Embodiment 3

[0060] Such as image 3 As shown in the structural diagram of the sound compensation system, an embodiment of the present invention proposes a sound compensation system, including a sound detection device 100 , a compensation filter 200 and a sound generation device 300 .

[0061] The sound detection device 100 is connected to the compensation filter 200 , and the compensation filter 200 is connected to the sound generating device 300 .

[0062] The sound detection device 100 is used to pick up the sound signal; the compensation filter 200 generates a compensation signal based on the picked up sound signal and the sound compensation filter transfer function determined by the sound compensation method described in Embodiment 1 or Embodiment 2; The device 300 emits a compensation sound signal according to the compensation signal.

[0063] Specifically, the sound detection device 100 is a microphone, the compensation filter circuit is a DSP chip, and the sound generating device ...

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Abstract

The invention discloses a sound compensation method and system and an earphone, and relates to the field of acoustics and signal processing. The method comprises the steps of: determining a first sound characteristic transfer function and a second sound characteristic transfer function from a sound pickup position to a sound compensation position; determining a third sound characteristic transferfunction from a sound production position to the sound compensation position; and according to the first sound characteristic transfer function, the second sound characteristic transfer function and the third sound characteristic transfer function, determining a sound compensation filter transfer function. Compared to the prior art, according to the invention, problems of sound production limitation and left and right ear non-time-difference listening of a speaker can be solved; consistency of sound heard when an ear protection device is worn and sound heard by naked ears is implemented; ambient sound is accurately reduced, so that a user can accurately monitor the ambient sound when wearing the ear protection device and a case that the ambient sound cannot be accurately monitored to causemisjudgment so as to cause a danger is avoided; and the method is simple and easy to implement.

Description

technical field [0001] The invention relates to the field of acoustics and signal processing, in particular to a sound compensation method, system and earphones. Background technique [0002] For those who work under strong environmental noise, in order to protect their hearing, protective equipment must be worn on both ears. The existing protective equipment includes earplugs and active noise reduction headphones. Earplugs are a method of passive noise reduction to reduce the damage to human hearing caused by environmental noise; active noise reduction earphones combine passive noise reduction and active noise reduction to effectively eliminate environmental noise and protect people's hearing. Whether it is earplugs or active noise-cancelling headphones, while reducing environmental noise, it also shields some useful sound information. For example, soldiers fighting in harsh environmental noises must always wear active noise-cancelling headphones in order to protect their h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/10H04R3/12
CPCH04R1/1083H04R3/12H04R2201/10H04R2430/00
Inventor 虞安波
Owner HUITING ACOUSTICS TECH BEIJING CO LTD
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