From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ob0-f171.google.com (mail-ob0-f171.google.com [209.85.214.171]) (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 52F622012AC for ; Tue, 8 May 2012 17:32:38 -0700 (PDT) Received: by obfk16 with SMTP id k16so22363774obf.16 for ; Tue, 08 May 2012 17:32:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=JW6BNWl6Exyrz8kFAnit5pJVd74rUhPa68vywgHISZ4=; b=oi309lkoGz3UfUO4SJVasw2B1/BHn/g9Bg49bMrM2TlXmBfeMrmGosAJoE33gT8h7I t2MZKco7IXXs6OSYsiZZRMSIushD1fwZPdRYaQBZeD1WDrpDtTCL01iFFDgFaiOfRDd5 vGaBJYQsI4buqYeFFD4EISr7lOSLSIX07YrNTcJb6z/DB57qaLPIhk3vaaBJtzji+xdN Vyum3Rx+s8Aa6idhcJuR8IgdBELsnoRdZjSv7peiCJpfL5guKuzn1kEBlfF3CrN2tE4n mmAp4nFALalbhGC66x2Ct536rcsDAvQPKYPCehlVQoNZqyPFYGTDWXDRT3hg0EQ6Gskx A8vg== MIME-Version: 1.0 Received: by 10.182.31.11 with SMTP id w11mr11006377obh.64.1336523557255; Tue, 08 May 2012 17:32:37 -0700 (PDT) Received: by 10.182.113.40 with HTTP; Tue, 8 May 2012 17:32:37 -0700 (PDT) Received: by 10.182.113.40 with HTTP; Tue, 8 May 2012 17:32:37 -0700 (PDT) In-Reply-To: References: Date: Tue, 8 May 2012 20:32:37 -0400 Message-ID: From: tz To: Dave Taht Content-Type: multipart/alternative; boundary=14dae93a1495dd3af004bf8fa320 Cc: thumbgps-devel@lists.bufferbloat.net Subject: Re: [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 00:32:38 -0000 --14dae93a1495dd3af004bf8fa320 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Sound doesn't penetrate sofa cushions that well, and if you can trigger the speakers anyway, why not just have the phone say "I'm here". Using google to dial your lost phone is something I've done on occasion. GPS isn't quite accurate enough. On May 8, 2012 8:09 PM, "Dave Taht" wrote: > 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." > > > -- > Dave T=E4ht > SKYPE: davetaht > US Tel: 1-239-829-5608 > http://www.bufferbloat.net > _______________________________________________ > Thumbgps-devel mailing list > Thumbgps-devel@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/thumbgps-devel > --14dae93a1495dd3af004bf8fa320 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable

Sound doesn't penetrate sofa cushions that well, and if you can trig= ger the speakers anyway, why not just have the phone say "I'm here= ".

Using google to dial your lost phone is something I've done on occas= ion.

GPS isn't quite accurate enough.

On May 8, 2012 8:09 PM, "Dave Taht" &l= t;dave.taht@gmail.com> wrote:=
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."


--
Dave T=E4ht
SKYPE: davetaht
US Tel: 1-239-829-560= 8
http://www.bufferb= loat.net
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