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Hearing protection method and sound output device

A sound output device and hearing technology, applied in the direction of amplification control, electrical components, gain control, etc., can solve the problems of feeling uncomfortable and changing the output sound frequently

Inactive Publication Date: 2007-10-24
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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AI Technical Summary

Problems solved by technology

[0004] However, if the user is in an environment where the ambient sound changes frequently, the volume control device will frequently change the volume of the output sound
And changing the volume of the output sound frequently will make the user feel uncomfortable when enjoying music or listening to the radio
Moreover, simply considering the volume level cannot truly reflect the hearing damage caused by sounds of different amplitudes

Method used

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  • Hearing protection method and sound output device
  • Hearing protection method and sound output device
  • Hearing protection method and sound output device

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Embodiment Construction

[0014] FIG. 1 is a block diagram of a sound output device for hearing protection in an embodiment of the present invention. The sound output device 10 includes an interface unit 12 , a hearing protection system 13 and a sound sensor 14 . The audio output device 10 receives an analog audio signal output by an audio signal source 11 through the interface unit 12 . The sound signal source 11 can be an audio reproduction device, a wireless signal playing device, or a TV set.

[0015] The hearing protection system 13 receives the analog sound signal and calculates the sound energy value of the analog sound signal; when the sound energy value reaches a reference energy value K, automatically lowers the current gain value, or generates a visual / auditory warning signal reminder The user manually lowers the current gain value. The sound sensor 14 can be an earphone or a speaker, which outputs the sound corresponding to the analog sound signal. The reference energy value is the maxim...

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Abstract

The provided method for protecting audition comprises: detecting the volume degree of environment to obtain the reference energy value; receiving analog sound signal from a source, conversing the analog signal into digital signal; sampling the signal with pre-set sampling frequency to obtain multiple amplitude values; taking these amplitude values as one parameter to calculate the sound energy value in a pre-set time interval; when the sound energy value up to the former reference value, generating a protective signal and reducing the gain value.

Description

【Technical field】 [0001] The invention relates to a volume control method and a sound output device, in particular to a volume control method and a sound output device according to ambient sound. 【Background technique】 [0002] With the development of digital products, handheld playback devices (such as MP3, MP4) are widely used. In an environment with relatively high noise, in order to be able to hear desired audio signals, the user will continuously increase the volume as the ambient sound increases. However, users all have a hearing physiological limit, that is, Loudness Discomfort Level (LDL). If the user's ears are exposed to an environment exceeding the loudness discomfort level for a long time, it will cause damage to the user's hearing. [0003] In order to solve this problem, a volume control device and method appear on the market. The volume control device provides a volume setting table, and the volume setting table lists the gain values ​​corresponding to each n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03G3/20
CPCH03G3/3089
Inventor 李兵李晓光蔡文升谢冠宏
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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