Invention Grant
US09571938B2 Microphone element and device for detecting acoustic and ultrasound signals 有权
用于检测声和超声信号的麦克风元件和装置

Microphone element and device for detecting acoustic and ultrasound signals
Abstract:
A capacitive MEMS microphone element is described which may be used optionally for detecting acoustic signals (microphone mode) or for detecting ultrasound signals in a defined frequency range (ultrasound mode). In the layered structure of the MEMS microphone element, at least two carrier elements for the two electrode sides of a capacitor system are formed one above the other and at a distance from one another for signal detection. At least one of the two carrier elements is sound pressure-sensitive and at least one of the two electrode sides includes at least two electrode segments which are electrically contactable independent of one another, which together with the at least one electrode of the other electrode side form partial capacitances which are independent of one another.
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