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Patent Searching and Data


Title:
ACOUSTIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/049438
Kind Code:
A1
Abstract:
Provided is an acoustic device capable of allowing people located in both the front side and rear side to hear reproduced sounds over a wide frequency range. This acoustic device is provided with a flat speaker 3 for low frequency-range reproduction designed to emit sound from both the front side and the rear side of the acoustic device. The acoustic device is also provided with a first speaker 5F for middle/high frequency-range reproduction designed to emit sound in a direction in which the front face of the flat speaker 3 is oriented, and a second speaker 5R for middle/high frequency-range reproduction designed to emit sound in a direction in which the rear face of the flat speaker 3 is oriented. Preferably, the first speaker 5F is driven using a sound signal corresponding to the middle/high frequency range and a sound signal obtained by inverting the phase of this sound signal is used to drive the second speaker 5R.

Inventors:
NOZAKI, Akihiko (10-1Nakazawa-cho,Naka-ku,Hamamatsu-sh, Shizuoka 50, 〒4308650, JP)
SANO, Tsunenori (10-1Nakazawa-cho,Naka-ku,Hamamatsu-sh, Shizuoka 50, 〒4308650, JP)
NORO, Masao (10-1Nakazawa-cho,Naka-ku,Hamamatsu-sh, Shizuoka 50, 〒4308650, JP)
Application Number:
JP2018/020003
Publication Date:
March 14, 2019
Filing Date:
May 24, 2018
Export Citation:
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Assignee:
YAMAHA CORPORATION (10-1, Nakazawa-cho Naka-ku, Hamamatsu-sh, Shizuoka 50, 〒4308650, JP)
International Classes:
H04R1/26; H04R1/02; H04R1/28; H04R1/32; H04R3/00; H04R3/14; H04R7/04
Domestic Patent References:
WO2014021178A12014-02-06
Foreign References:
JP2006287545A2006-10-19
JPS5524859U1980-02-18
Attorney, Agent or Firm:
TACHIBANA, Kenji et al. (21st Floor, Nakanoshima Intes Bldg. 6-2-40, Nakanoshima, Kita-ku, Osaka-sh, Osaka 05, 〒5300005, JP)
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