The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 2019
Filed:
Jul. 24, 2018
Taiyo Yuden Co., Ltd., Chuo-ku, Tokyo, JP;
Shigeo Ishii, Takasaki, JP;
Hiroshi Hamada, Takasaki, JP;
Yutaka Doshida, Takasaki, JP;
Takashi Tomita, Takasaki, JP;
TAIYO YUDEN CO., LTD., Tokyo, JP;
Abstract
An electroacoustic transducer includes a dynamic speaker that generates a first acoustic sound, and a piezoelectric speaker that generates a second acoustic sound. The sum of the sound pressures of the first and second acoustic sounds in a crossover frequency range of the sound pressure of the first acoustic sound and the sound pressure of the second acoustic sound, is adjusted to be equal to or greater than 0.5 times the sound pressure of the first acoustic sound in the crossover frequency range so as to improve the acoustic properties in the crossover frequency range.