FIELD: acoustics.
SUBSTANCE: invention relates to a sound absorbing device which includes a Helmholtz resonator, and to an electronic device and an image forming apparatus, using a sound absorbing device. Sound absorbing device comprises of many sound-absorbing units, while the frequency of sound absorbed by at least one of the sound-absorbing units, overlaps at least partially with the frequency of sound with a volume level, increased by installing another sound-absorbing unit.
EFFECT: technical result of the invention is the possibility of providing a sound-absorbing device, which includes a sound-absorbing unit and in which an increase in the volume of sound with frequencies outside the frequency of sound, absorbed by means of a sound-absorbing unit, can be suppressed.
16 cl, 1 tbl, 20 dwg
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