Ear-protecting device
作者： Marshall N Anderson
DOI:
关键词: Noise level 、 Computer science 、 Acoustics
摘要: An ear-protecting device is provided which adapted to protect the wearer when disposed in an environment having a high and disturbing noise level. The with manually controlled means whereby may simple manipulation vary sound resistant characteristics of device, desired, provide comfort for and/or order permit engage conversation another without remove from its position.
lens.org 参考文章(5)
Jackson A Aileo, Valve for sound attenuating device ,(1965)
William R Bohner, Jack N Simpson, Ear protector attachment in combination with a safety cap ,(1964)
Frank P Haluska, Ear muff mounting structure for headgear ,(1964)
Catroppa Frank A, Hirsch Sidney, Protective and sound attenuation helmet ,(1966)
Lawrence C Hutchinson, Edward P Megarry, Attachment mounting means for hearing protector ear cups ,(1969)