[AUDITORY] Ear Probe Mics and detecting the heartbeat? ("Jelfs, Sam" )

Subject: [AUDITORY] Ear Probe Mics and detecting the heartbeat? From: "Jelfs, Sam" <sam.jelfs@xxxxxxxx> Date: Fri, 28 Jun 2013 10:36:19 +0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY> --_000_2457CAAB54A05440B0CE80D0D831099E36332CBD011DB3MPN1041MG_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Dear List, Just a question for those of you with experience using ear probe microphone= s, do you ever hear the heartbeat? I've built a couple of in-ear microphone= s, and can hear my own heartbeat, but the quality is relatively poor, and o= nly works in very low-noise conditions. I was looking in to using dedicated= probe mics, such as Etymotic ER-7C (http://www.etymotic.com/pro/er7c-ts.as= px) and whether that might give me a better signal-to-noise ratio, but just= wondered if anyone has any experience of this before I buy some. Thanks Sam Jelfs -------------------------------------------------- Sam Jelfs Research Scientist Philips Research Laboratories, Eindhoven Smart Sensing & Analysis Address : High Tech Campus 36 5656 AE Eindhoven The Netherlands Tel: +31 (0)40 27 42402 e-Mail: sam.jelfs@xxxxxxxx ________________________________ The information contained in this message may be confidential and legally p= rotected under applicable law. The message is intended solely for the addre= ssee(s). If you are not the intended recipient, you are hereby notified tha= t any use, forwarding, dissemination, or reproduction of this message is st= rictly prohibited and may be unlawful. If you are not the intended recipien= t, please contact the sender by return e-mail and destroy all copies of the= original message. --_000_2457CAAB54A05440B0CE80D0D831099E36332CBD011DB3MPN1041MG_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <html> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"= > <style>  </style> </head> <body lang=3D"EN-US" link=3D"blue" vlink=3D"purple"> <div class=3D"WordSection1"> Dear List,   Just a question for those of yo= u with experience using ear probe microphones, do you ever hear the heartbe= at? I’ve built a couple of in-ear microphones, and can hear my own he= artbeat, but the quality is relatively poor, and only works in very low-noise conditions. I was looking in to using ded= icated probe mics, such as Etymotic ER-7C (<a href=3D"http://www.etymotic.c= om/pro/er7c-ts.aspx">http://www.etymotic.com/pro/er7c-ts.aspx</a>) and whet= her that might give me a better signal-to-noise ratio, but just wondered if anyone has any experience of this before I buy= some.   Thanks   Sam Jelfs   --------------------------------------------------</= p>   Sam Jelfs Research Scientist Philips Research Laborat= ories, Eindhoven Smart Sensing & Analysis   Address : High Tech Campus 36 5656 AE  Eindhoven The Netherlands Tel: +31 (0)40 27 42402 e-Mail: sam.jelfs@xxxxxxxx   </div> <hr> The information contained in= this message may be confidential and legally protected under applicable la= w. The message is intended solely for the addressee(s). If you are not the = intended recipient, you are hereby notified that any use, forwarding, dissemination, or reproduction of this message i= s strictly prohibited and may be unlawful. If you are not the intended reci= pient, please contact the sender by return e-mail and destroy all copies of= the original message. </body> </html> --_000_2457CAAB54A05440B0CE80D0D831099E36332CBD011DB3MPN1041MG_--

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Electrical Engineering Dept., Columbia University