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Broadcasting device which can sense noise and adjust volume automatically

A broadcasting device and automatic adjustment technology, applied in the field of sound reinforcement, can solve problems such as low signal-to-noise ratio, affect language clarity, and users can't hear clearly, so as to improve judicial fairness and justice, improve language clarity, and improve teaching effects Effect

Inactive Publication Date: 2018-06-08
江苏中协智能科技有限公司
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AI Technical Summary

Problems solved by technology

[0003] There is a long-term problem with indoor sound reinforcement systems. Because of different application scenarios, it is difficult to unify the volume. Too high volume will affect the user experience, and too low volume will affect the correct transmission of content, causing many people to "hear"
At the same time, due to the different environments used by the sound reinforcement system, the playing environment noise varies. If the volume is too low, the signal-to-noise ratio will be too low, which will also affect the user experience and make the user "not clear". affect speech intelligibility

Method used

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  • Broadcasting device which can sense noise and adjust volume automatically
  • Broadcasting device which can sense noise and adjust volume automatically

Examples

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Embodiment Construction

[0031] Such as figure 1 , is a structural diagram of a broadcasting device that senses noise and automatically adjusts the volume. The noise sensor and the music sensor perceive the noise and music in the playback environment respectively. The basis for the judgment is the frequency characteristics of the sound wave. If the frequency is irregular If it is noise, if the frequency is regular, it is judged as musical sound.

[0032] The noise sensor and the musical sound sensor transmit the perceived noise and musical sound to the noise sound pressure calculator and the musical sound pressure calculator respectively, and calculate the sound pressure of the noise and musical sound through their frequency and amplitude.

[0033] When calculating sound pressure, it is necessary to know the relationship between sound intensity (I) and sound intensity (P) and sound pressure. The sound intensity is proportional to the speed of the sound wave, the square of the angular frequency of the...

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Abstract

The invention discloses a broadcasting device which can sense noise and adjust volume automatically. The broadcasting device can automatically adjust the volume of the playing according to the sound pressure of the playing environment noise, so as to improve the signal to noise ratio of the whole broadcast system; wherein the process of sensing the sound pressure and adjusting the volume automatically is performed in a certain cycle, and the cycle can be self-defined; meanwhile, the signal to noise ratio in the device can be set in advance, and the value of the signal to noise ratio can be self-defined.

Description

technical field [0001] The invention relates to the field of sound reinforcement, in particular to a broadcasting device that senses noise and automatically adjusts volume. Background technique [0002] The indoor sound reinforcement system is one of the four types of sound reinforcement systems (the remaining three types are: hall sound reinforcement system, public address system and dedicated conference system), and the application scenarios of the indoor sound reinforcement system are also very common: a class in a school , dozens of students attend classes together; in some training institutions, a teacher "teaches small lessons" to a dozen students; [0003] There is a long-term problem with indoor sound reinforcement systems. Because of different application scenarios, it is difficult to unify the volume. If the volume is too high, it will affect the user experience, and if the volume is too low, it will affect the correct transmission of the content, causing many peop...

Claims

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Application Information

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IPC IPC(8): H04R27/00
CPCH04R27/00H04R2227/001
Inventor 不公告发明人
Owner 江苏中协智能科技有限公司
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