From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lb0-f171.google.com (mail-lb0-f171.google.com [209.85.217.171]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 68093208A7C for ; Tue, 8 May 2012 17:09:17 -0700 (PDT) Received: by lbom4 with SMTP id m4so10250097lbo.16 for ; Tue, 08 May 2012 17:09:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type :content-transfer-encoding; bh=P1VhWpr639UjrVHWEvLoUQp705rhqmSi3qkq044hN68=; b=IgIDcZqzqMr67DnNGsq0Wt8Opc9U98eZEpaAYcRG4T+xCQ1+ZfOKTh/2kKDFIje5uq RjekEBtN8mYI2lfqxejk8afIDSXTDhm/WOG1MDyiYI30IUfn7+l3ynqIDnn02U2Iz6o1 MlhRYu8ZjdG/A29hpnpXyaBjyy5aCjfvFZFf81s1u6zvE+Rx4iFNUhm3zcfCK57J8iOe 1put6BcJ+BEAej37G+3WpJk8ecXUajlYOeUfI210sj3AeDpAv9kyWchNS3dmra0CMTk8 8CMooFmFUncjIr4wk0X4E5gzCO0mDCKVx459iDS4yc1M88gtm98hxUKMS8aAJ4DHTxAh Z8HQ== MIME-Version: 1.0 Received: by 10.152.102.228 with SMTP id fr4mr4716246lab.23.1336522154789; Tue, 08 May 2012 17:09:14 -0700 (PDT) Received: by 10.112.132.98 with HTTP; Tue, 8 May 2012 17:09:14 -0700 (PDT) Date: Tue, 8 May 2012 17:09:14 -0700 Message-ID: From: Dave Taht To: thumbgps-devel@lists.bufferbloat.net Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Subject: [Thumbgps-devel] lost something lately? X-BeenThere: thumbgps-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 May 2012 00:09:17 -0000 I saw this as a last post on the blog post that started all this, and it set me to thinking... "Since sound travels at about 5s/mile that=92s about 1 foot per millisecond. If you have a bunch of cheap computers, say on the same WiFi network that can synchronize their clocks within an accuracy of 1ms, then they can use sonar pings via their microphones and speakers to plot their relative position within an accuracy of ~1foot. Could be useful if you have a household with multiple laptops, phones, and tablets, and you don=92t know that a phone is lost in the cushions of a couch." --=20 Dave T=E4ht SKYPE: davetaht US Tel: 1-239-829-5608 http://www.bufferbloat.net