PIETER GERARD VAN 'T HOF,JOOST LEENDERT LODDER,PIETER GERARD VAN T HOF
申请号：
NL2018029
公开号：
NL2018029B1
申请日:
2016.12.20
申请国别(地区):
NL
年份:
2018
代理人:
摘要：
An earplug (100) and method for attenuating sound (S). An acoustic canal (20) extends straight through a housing (10) to guide the sound (S) inside an ear canal. The acoustic canal (20) comprises a canal section (21) dimensioned to fit at least partially inside the ear canal. The canal section (21) ends at one side in a first exterior opening (21a) to let the sound (S) into the ear canal. Another side of the canal section (21) transitions into a first resonance volume (22) with a relatively wide diameter (A2). A second resonance volume (23) ends at one side in a second exterior opening (23a) and, the other side being separated from the first resonance volume (22) by a sound attenuating mesh (14). This provides resonance cavities (C1,C2) that compensate attenuation of the mesh (14) over a wide range of high frequencies (Fr).
