DUCT HAVING SOUND DIMINISHING FUNCTION, AND DUCT TYPE VENTILATOR FOR BUILDING

摘要

PROBLEM TO BE SOLVED: To provide a duct for developing a sound diminishing effect in a wide range including intermediate and low frequency areas by controlling frequency as an sound insulation object.;SOLUTION: A sound inlet port 11 is provided on one end part of the duct 10 including a long sound propagation passage 13 in one direction. A sound outlet port 12 is formed on other end part of the duct 10, and a room 16 for forming a resonator is partitioned in the propagation passage 13.;COPYRIGHT: (C)2007,JPO&INPIT