US 11,683,637 B2
Signal converter
Masao Noro, Hamamatsu (JP)
Assigned to YAMAHA CORPORATION, Hamamatsu (JP)
Filed by YAMAHA CORPORATION, Hamamatsu (JP)
Filed on Mar. 22, 2022, as Appl. No. 17/701,129.
Claims priority of application No. JP2021-051087 (JP), filed on Mar. 25, 2021.
Prior Publication US 2022/0312107 A1, Sep. 29, 2022
Int. Cl. H04R 1/26 (2006.01); H04R 9/02 (2006.01); H04R 9/08 (2006.01); H04R 7/12 (2006.01); H04R 1/04 (2006.01); H04R 3/00 (2006.01); H04R 9/04 (2006.01)
CPC H04R 1/265 (2013.01) [H04R 1/04 (2013.01); H04R 3/00 (2013.01); H04R 7/12 (2013.01); H04R 9/025 (2013.01); H04R 9/046 (2013.01); H04R 9/08 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A signal converter comprising:
a chamber having a first opening at one end and a second opening at a second end opposite the first end;
a first diaphragm disposed so as to cover the first opening;
a second diaphragm disposed so as to cover the second opening;
a first converter disposed in the chamber and configured to generate a first signal based on a vibration of the first diaphragm;
a second converter disposed in the chamber and configured to generate a second signal based on a vibration of the second diaphragm; and
a subtractor configured to subtract the first signal from the second signal so as to generate a third signal,
wherein the vibrations of the first diaphragm and the second diaphragm have a first resonance mode in which the first diaphragm and the second diaphragm move in a same direction as each other and a second resonance mode in which the first diaphragm and the second diaphragm move in an opposite direction from each other, and
wherein, the third signal corresponds to the vibrations in the second resonance mode.