Title:
SOUND REFLECTION STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2020/165651
Kind Code:
A1
Abstract:
[Problem] To provide a means for improving sound reflection performance in the frequency range of 1500-2500 Hz. [Solution] Provided is a sound reflection material that comprises an elastic sheet and a support part that holds the sheet and divides the sheet into sections, wherein the sheet rigidity (k) and the sheet surface density (m) of the sections satisfy the relationship in formula 1. A sound reflection structure is formed by providing the sound reflection material on a substrate so that the sheet is separated from the substrate.
Inventors:
HORIBE NORIFUMI (JP)
MIURA SUSUMU (JP)
MIURA SUSUMU (JP)
Application Number:
PCT/IB2020/000116
Publication Date:
August 20, 2020
Filing Date:
February 12, 2020
Export Citation:
Assignee:
NISSAN MOTOR (JP)
RENAULT SAS (FR)
RENAULT SAS (FR)
International Classes:
G10K11/16; G10K11/168; G10K11/172
Domestic Patent References:
| WO2019022245A1 | 2019-01-31 |
Foreign References:
| JP2013174849A | 2013-09-05 | |||
| JP2018028326W | 2018-07-27 |
Other References:
NI SUI ET AL., APPLIED PHYSICS LETTERS, vol. 106, 2015, pages 171905
See also references of EP 3926622A4
See also references of EP 3926622A4
Attorney, Agent or Firm:
HATTA & ASSOCIATES et al. (JP)
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