DEVICE TO ASSESS ACOUSTIC QUALITY OF ROOM Russian patent published in 2012 - IPC E04B1/99 G01H13/00 

FIELD: instrument making.

SUBSTANCE: device comprises a sound frequency generator, a power amplifier, a switch and a radiator of sound signals, a measurement microphone, a microphone amplifier and a unit of bandpass filters, a unit of amplitude detectors is introduced, as well as six identical channels of sound code generation, a flat-panel screen, a clock-pulse generator and a frequency divider.

EFFECT: possibility of efficient visual assessment of acoustic quality of a room in the range of nine octave bands of 63…16000 Hz on a flat-panel screen.

7 dwg, 2 tbl