US Patent Issued to FOSTER ELECTRIC on July 29 for "Electroacoustic transducer and electroacoustic transducer unit" (Japanese Inventor)

ALEXANDRIA, Va., July 30 -- United States Patent no. 12,375,848, issued on July 29, was assigned to FOSTER ELECTRIC COMPANY Ltd. (Tokyo).

"Electroacoustic transducer and electroacoustic transducer unit" was invented by Hiroshi Sugata (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An electroacoustic transducer includes a port that guides a component of at least a partial frequency band of a sound radiated from a first diaphragm in a direction opposite to a direction in which a front surface 38A of a second diaphragm faces, to an external space on a front surface side of the second diaphragm. As the port is provided, the electroacoustic transducer is configured such that a sound pressure of a synthesize...