Patent ID: 8447056
Filing Date: 2013-05-21
Classification: H04R

Abstract:
1. A dynamic microphone comprising: a dynamic microphone unit; a vibration pickup that detects vibration of the dynamic microphone unit, and outputs a signal for cancelling a vibration noise signal output from the dynamic microphone unit; and a microphone case that supports the dynamic microphone unit and the vibration pickup, wherein the vibration pickup includes a laminated ceramic piezoelectric element that is supported in an integrated manner with a microphone unit case, and detects vibration of the microphone unit case and outputs a signal corresponding to the detected vibration, the laminated ceramic piezoelectric element has a capacitance that defines a resonance circuit in conjunction with an inductance of an inductor connected to the laminated ceramic piezoelectric element, the resonance circuit producing a response signal to acceleration corresponding to that of the vibration noise from the microphone unit, and the resonance circuit is connected to the microphone unit such that the response signal is output in an opposite direction to the vibration noise signal output from the microphone unit.