Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: =?UTF-8?B?TWF0aGlhcyBLxZFyYmVy?= Newsgroups: comp.sys.mac.misc Subject: Re: unidentified alert sound: 4 very low 'sighs'? Date: Mon, 21 Oct 2013 20:42:01 +0800 Lines: 12 Message-ID: References: <201020130951539633%YourName@YourISP.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Trace: individual.net cyHEQ13KZvkrie304VZ0yAGbtQKjFIBlbuzMmLVjg7JJVGL/s= Cancel-Lock: sha1:XlCsEu6XOEeMW2CIBQjDcYlp5U0= User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:24.0) Gecko/20100101 Thunderbird/24.0.1 In-Reply-To: <201020130951539633%YourName@YourISP.com> X-Enigmail-Version: 1.5.2 OpenPGP: id=78D0B871 Xref: csiph.com comp.sys.mac.misc:3227 >> It could be that the sound is being made by one of the fans in the MBP - >> that would be my suspicion. > > Fans, hard drive, CD ... sounds like it could be anything that spins > and is slowing down and speeding up again. Possible, but it souds too regular (4 exactly spaced sounds, always 4) and they sound generated, not something that hardware makes by just operating (even if faultily)