Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 5/3/83 based; site homxb.UUCP Path: utzoo!watmath!clyde!bonnie!akgua!whuxlm!whuxl!houxm!homxb!hrs From: hrs@homxb.UUCP (H.SILBIGER) Newsgroups: net.audio Subject: Re: Headphones and Hearing loss Message-ID: <674@homxb.UUCP> Date: Tue, 16-Jul-85 08:41:52 EDT Article-I.D.: homxb.674 Posted: Tue Jul 16 08:41:52 1985 Date-Received: Thu, 18-Jul-85 03:51:25 EDT References: <30200012@gypsy.UUCP> <227@harvard.ARPA>, <359@creare.uucp> Organization: AT&T Bell Labs, Holmdel NJ Lines: 28 The OSHA Federal regulations on hearing protection has the following limits on exposure to noise: Sound Pressure Maximum Level, dB(20uPa) Time, hrs 85 hearing monitoring required 90 8 95 4 100 2 105 1 110 .5 115 .25 Levels over 115 dB are not permitted. These levels apply to sound fields. Because of characteristics of the ear canal, an additional 3 dB can be allowed when using earphones of the closed type. It is possible to get a hearing loss from listening to music at excessive levels over earphones