Microphones and Smart Voice Devices

Abstract

According to an exemplary embodiment of the present disclosure, a microphone and a smart voice device are provided. The microphone includes: a housing; a diaphragm fixed in the housing and including a first sound pickup surface and a second sound pickup surface opposite to each other, and the diaphragm is configured to act on the first sound pickup surface and the second sound pickup surface The sound pressure on the surface is used to output an electrical signal; the main sound hole is formed on the shell and configured to make the sound wave from the outside of the shell pass through the main sound pickup channel and be transmitted to the first sound pickup surface at the first sound pressure and an auxiliary sound pickup hole, formed on the casing, and configured to allow sound waves to pass through the auxiliary sound pickup channel and be transmitted to the second sound pickup surface at a second sound pressure different from the first sound pressure. The microphone structure according to the present disclosure can improve the signal-to-noise ratio and consistency while effectively reducing the pressure of suppressing the volume of the speaker through an algorithm. Smart voice devices including the microphone have a higher voice recognition rate, improving user experience.

Description

technical field [0001] Embodiments of the present disclosure mainly relate to the technical field of microphones, and more specifically, to micro-electro-mechanical system-based microphones and intelligent voice devices. Background technique [0002] At present, as smart voice devices such as smart speakers become more and more popular, the requirements for microphones are also getting higher and higher. Specifically, at present, most intelligent voice devices use micro-electro-mechanical systems (MEMS)-based omnidirectional sound pickup microphones. Due to the limited shape of the speaker box, the microphone and speaker are close together, which results in loud volume from the speaker to the microphone, sometimes far greater than the volume reaching the microphone by the user used to control the smart voice device. On the one hand, this leads to a reduction in the recognition rate of the user's voice control instructions, which brings inconvenience to the user's voice cont...

AI Technical Summary

Problems solved by technology

On the one hand, this leads to a reduction in the recognition rate of the user's voice control instructions, which brings inconvenience to the user's voice control of smart voice devices

On the other hand, this will also affect the playback effect of the speakers in some cases

[0003] Although echo cancellation algorithms are currently used to eliminate this adverse effect of omnidirectional microphones as much as possible, the cancellation effect is limited and brings significant algorithm pressure to the processor

In addition, there are currently electret-based directional microphones used in smart voice devices, but electret microphones also have large volume, many restrictions on product design, and poor signal-to-noise ratio, consistency, and aging performance due to their own defects. Poor and other problems

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