To make it possible to improve a low-tone reproducing ability with a simple structure in an acoustic device including speakers in a headrest. The acoustic device includes a core material of a closed structure functioning as a core of a headrest main body, acoustic speakers 50, 50 disposed in the core material, and hollow headrest stays 15, 15 that pierce through the core material. The headrest stays 15, 15 circulate the air on the inside of the core material to the outer side via hollow sections.
ACOUSTIC DEVICE
2017-04-20
Patent
Elektronische Ressource
Englisch
ACOUSTIC DEVICE, ACOUSTIC CONTROL DEVICE, AND PROGRAM
Europäisches Patentamt | 2019
|ACOUSTIC DEVICE, ACOUSTIC PROCESSING METHOD, AND ACOUSTIC PROCESSING PROGRAM
Europäisches Patentamt | 2015
|