Title:
SPEAKER DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/121692
Kind Code:
A1
Abstract:
This speaker device is provided with: a speaker unit which is used in a state of being attached to a helmet and performs voice output; a speaker housing which has a back surface wall part covering the speaker unit from a back surface side and in which a space between the back surface of the speaker unit and the back surface wall part is formed as an output space for voice output from the back surface of the speaker unit; and a duct which has an internal space communicating with the output space and guides the voice being output to the output space toward the outside of the helmet. The distance between the back surface of the speaker unit and the back surface wall part is made smaller than the distance of the internal space of the duct in the direction in which the voice is guided.
Inventors:
NAGATA KOJI (JP)
TANIZAWA MASATOSHI (JP)
TANIZAWA MASATOSHI (JP)
Application Number:
PCT/JP2019/043466
Publication Date:
June 18, 2020
Filing Date:
November 06, 2019
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
H04R1/02; A42B3/30; H04R1/10; H04R1/28
Foreign References:
| US4977975A | 1990-12-18 | |||
| JPH04227396A | 1992-08-17 | |||
| JP2005163222A | 2005-06-23 | |||
| JPH01221504A | 1989-09-05 | |||
| JPS59169320U | 1984-11-13 | |||
| JPS57160283U | 1982-10-07 |
Attorney, Agent or Firm:
IWATA, Masanobu et al. (JP)
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