PHASE SEQUENCED MEMS MICROPHONES FOR BEAM-FORMING APPLICATIONS APPLICATION NOTE

PublishTime：2023-09-11

●Omni-directional microphones are commonly utilized in arrays of two or more. Microphone arrays detect differences in arrival time to focus on sounds originating from a preferred direction, while canceling sounds from unwanted directions. When physical space constraints limit array size, phase-matching sets the low frequency limit for directional performance.
●Manufacturers may choose to perform an initialization measurement and apply a correction in software to align microphone phase. This process requirement contributes cost and complexity that could be saved by instead using microphone elements with matched phase. Some of the newest MEMS microphone introductions are trimmable for amplitude and phase, and feature an absolute tolerance. Phase sequencing facilitates array implementation for other common microphone series.

Brand of Product：	Knowles
Part#：	MM20-33366-B116 、 MM20-33639-B116 、 MM20-33601-B118 、 MM25-33663-B141 More Part#
Product Category：	PHASE SEQUENCED MEMS MICROPHONES 、 Omni-directional microphones 、 MEMS microphone More
Application：	More
Data Type：	Application note & Design Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	1200;3200;5000
Language：	English Chinese Chinese and English Japanese
Date of Creation：	2022/1/25
Version Number：
Data Encoding：	AN-26
Data Size：	1.1 MB

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