An adjustable sound valve for use in a hearing protection device, such as a set of industrial-use ear-muffs or helmet. The purpose of the sound valve being to allow the user to select the degree of attenuation of environmental noise. The sound valve having an attenuator for varying the passage of sound to the ear of a user and a controller attached thereto. The controller is configurable between a first position in which the passage size is pre-determined and a second position in which the passage size is variable based on a user-determined attenuator setting.
申请公布号
CA2665891(C)
申请公布日期
2012.09.11
申请号
CA20092665891
申请日期
2009.05.12
申请人
VLACIC, NEVENA;VLACIC, MAJA;VLACIC, DOBRILA;VLACIC, MATIJA
发明人
VLACIC, NEVENA;VLACIC, MAJA;VLACIC, DOBRILA;VLACIC, MATIJA