Sound absorber and projector
AssigneeSeiko Epson Corporation
InventorsNorikazu Kadotani, Ken Terai, Yoshiaki Iwatani, Masatoshi Tanaka, Shin Aruga
Life of this patent
Estimating the term…
Abstract
A sound absorber includes a side surface section (a first wall section) in which a plurality of first holes are provided, the side surface section including a first surface and a second surface, a thin film stuck to the first surface of the side surface section, a partition wall (a second wall section) opposed to the second surface and provided in a position separated from the second surface, at least one second hole being provided in the partition wall, and a porous material provided to be opposed to the second wall section in a position separated from the partition wall.
Claims15
A sound absorber comprising:
- a first wall section in which a plurality of first holes are provided, the first wall section including a first surface and a second surface;
- a film stuck to the first surface or the second surface of the first wall section;
- a second wall section opposed to the second surface and provided in a position separated from the second surface, at least one second hole being provided in the second wall section;
- a porous material provided to be opposed to the second wall section in a position separated from the second wall section;
- a first sound absorbing section configured by the film which is stuck to the first surface or the second surface of the first wall section and a first space which is provided between the first wall section and the second wall section, to absorb a part of a sound wave with vibration of the film;
- a second sound absorbing section configured by a Helmholtz resonator which is comprised of a second space which is provided between the second wall and the porous material;
- and
- a third sound absorbing section configured by the porous material.
Dependencies are inferred from the claim text.