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US 10,720,134 B2Granted
Sound absorbing device, electronic device, and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorsMasahiro Ishida, Naoki Matsuda
Life of this patent
Estimating the term…
Abstract
A sound absorbing device includes: a plurality of sound absorbing units. A frequency of sound absorbed by at least one of the sound absorbing units overlaps, at least partially, with a frequency of sound with a volume increased by installation of another sound absorbing unit.
Claims16
A sound absorbing device comprising:
- a first sound absorbing unit configured to absorb a range of a first sound absorption frequency in which volume decreases with respect to sound generated by a sound source, and a range of a first volume increase frequency in which volume increases;
- and
- a second sound absorbing unit configured to absorb a range of a second sound absorption frequency in which volume decreases with respect to sound generated by the sound source, and a range of a second volume increase frequency in which volume increases, wherein
- the range of the first volume increase frequency and the range of the second sound absorption frequency at least partially overlap.
1 more element
Dependencies are inferred from the claim text.