ACOUSTIC SIGNAL OUTPUT DEVICE

WIPO Patent Application WO/2023/084577

A1

Provided is an acoustic signal output device comprising: one or more driver units; a first housing having a wall part provided with one or more first sound holes through which a first acoustic signal emitted from any one of the driver units is guided to the outside, and one or more second sound holes through which a second acoustic signal emitted from any one of the driver units is guided to the outside; and a second housing having a wall part provided with one or more third sound holes through which a third acoustic signal emitted from any one of the driver units is guided to the outside, and one or more fourth sound holes through which a fourth acoustic signal emitted from any one of the driver units is guided to the outside. Here, when a first position is used as reference, the rate of attenuation of the first acoustic signal at a second position farther as compared to the first position is at most a predetermined value that is less than the rate of attenuation through propagation in air of the acoustic signal at the second position using the first position as reference. Alternatively, when the first position is used as reference, the amount of attenuation of the first acoustic signal at the second position is at least a predetermined value that is more than the amount of attenuation through propagation in air of the acoustic signal at the second position using the first position as reference.

CHIBA HIRONOBU (JP)
KAKO TATSUYA (JP)
KOBAYASHI KAZUNORI (JP)

PCT/JP2021/041126

May 19, 2023

November 09, 2021

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NIPPON TELEGRAPH & TELEPHONE (JP)

H04R1/10

WO2019234940A1

2019-12-12

JP2008211642A	2008-09-11
US20210014602A1	2021-01-14
JP2008160506A	2008-07-10

NAKAO, Naoki et al. (JP)

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