Microscopic-hole muffler

The utility model provides a microscopic-hole muffler. Sound-attenuation units of the microscopic-hole muffler include I, II, III, and IV grade injection tubes which are nested sequentially from inside to outside, wherein the I-grade injection tube is connected with a noise entrance of the microscop...

Full description

Saved in:
Bibliographic Details
Main Authors SHANG WEICHENG, LIN LING, WANG JIANGUO, ZHOU RONGAN, JUN JUNKE, XUE JING, LAI DAICHU
Format Patent
LanguageChinese
English
Published 25.12.2013
Subjects
ACOUSTICS
ACOUSTICS NOT OTHERWISE PROVIDED FOR
METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL
MUSICAL INSTRUMENTS
PHYSICS
SOUND-PRODUCING DEVICES
Online AccessGet full text

Cover

More Information
Summary:The utility model provides a microscopic-hole muffler. Sound-attenuation units of the microscopic-hole muffler include I, II, III, and IV grade injection tubes which are nested sequentially from inside to outside, wherein the I-grade injection tube is connected with a noise entrance of the microscopic-hole muffler; the I, II, III, and IV grade injection tubes are all made of perforating metal sleeves; the I and II grade injection tubes have a perforation percentage of 3%-20% and the III and IV grade injection tubes have a perforation percentage of 1%-5%; depths of cavities between the I grade and II grade, between the II grade and III grade, and between the III grade and IV grade are 10mm-100mm and the injection tubes are kept to be relatively fixed through support parts. Distance and perforation percentage between the injection tubes are selected reasonably so that noises are reduced grade by grade to a sound range acceptable by people and an excellent sound-attenuation effect is achieved.
Bibliography:Application Number: CN20132395380U