Re: looking for recommendation for in-ear microphones (Tao Zhang )


Subject: Re: looking for recommendation for in-ear microphones
From:    Tao Zhang  <Tao_Zhang@xxxxxxxx>
Date:    Tue, 31 May 2011 05:29:37 -0500
List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>

--_000_D0340F82AB98CD4D8AF22F6DAC9EB8E94B09DC1EBDSTARKEYMAILms_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Michael, If you don't want to build your own using a probe tube and a miniature micr= ophone as Mike suggested, you can check out the ER-7C probe microphone from Etymotic = Research. Its noise floor is a little bit high, but may be fine for your application. We do suc= h measurements often in the lab. -Tao From: AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx= ILL.CA] On Behalf Of Ravicz, Mike Sent: Thursday, May 26, 2011 4:13 PM To: AUDITORY@xxxxxxxx Subject: Re: [AUDITORY] looking for recommendation for in-ear microphones Hello Michael, We have used Knowles miniature microphones <http://www.knowles.com/search/p= roduct.htm?x_sub_cat_id=3D8> for many years for many purposes, including in= -ear sound pressure recordings. We used a probe tube (as do most other peo= ple who make such recordings), which can cause noise floor problems at high= frequencies. The fairly new FG series of microphones from Knowles is smal= l enough that you could probably put the entire microphone in the ear canal= without affecting the sound field too much. (I see that the GA series is = even smaller, but we have not used them yet.) I assume that this is for hu= man subjects. Best regards, Mike Mike Ravicz, Eaton-Peabody Lab., Mass. Eye & Ear Infirmary, Boston MA 02114 +1 (617) 573-5591; +1 (617) 720-4408 FAX "In theory, there is no difference between theory and fact; but in fact, th= ere is." - someone --_000_D0340F82AB98CD4D8AF22F6DAC9EB8E94B09DC1EBDSTARKEYMAILms_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr= osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:= //www.w3.org/TR/REC-html40"><head><meta http-equiv=3DContent-Type content= =3D"text/html; charset=3Dus-ascii"><meta name=3DGenerator content=3D"Micros= oft Word 14 (filtered medium)"><title>RE: looking for recommendation for in= -ear microphones</title><style><!-- /* Font Definitions */ @xxxxxxxx {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} @xxxxxxxx {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman","serif";} a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;} p {mso-style-priority:99; mso-margin-top-alt:auto; margin-right:0in; mso-margin-bottom-alt:auto; margin-left:0in; font-size:12.0pt; font-family:"Times New Roman","serif";} span.EmailStyle18 {mso-style-type:personal-reply; font-family:"Calibri","sans-serif"; color:#1F497D;} .MsoChpDefault {mso-style-type:export-only; font-size:10.0pt;} @xxxxxxxx WordSection1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in;} div.WordSection1 {page:WordSection1;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext=3D"edit"> <o:idmap v:ext=3D"edit" data=3D"1" /> </o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue vli= nk=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span style=3D'f= ont-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Michae= l,<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0p= t;font-family:"Calibri","sans-serif";color:#1F497D'><o:p>&nbsp;</o:p></span= ></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Cali= bri","sans-serif";color:#1F497D'>If you don&#8217;t want to build your own = using a probe tube and a miniature microphone as <o:p></o:p></span></p><p c= lass=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibri","san= s-serif";color:#1F497D'>Mike suggested, you can check out the ER-7C probe m= icrophone from Etymotic Research. Its noise <o:p></o:p></span></p><p class= =3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibri","sans-se= rif";color:#1F497D'>floor is a little bit high, but may be fine for your ap= plication. We do such measurements<o:p></o:p></span></p><p class=3DMsoNorma= l><span style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:= #1F497D'>often in the lab.<o:p></o:p></span></p><p class=3DMsoNormal><span = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'= ><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:= 11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>-Tao<o:p></o:p></s= pan></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"C= alibri","sans-serif";color:#1F497D'><o:p>&nbsp;</o:p></span></p><div><div s= tyle=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0i= n'><p class=3DMsoNormal><b><span style=3D'font-size:10.0pt;font-family:"Tah= oma","sans-serif"'>From:</span></b><span style=3D'font-size:10.0pt;font-fam= ily:"Tahoma","sans-serif"'> AUDITORY - Research in Auditory Perception [mai= lto:AUDITORY@xxxxxxxx <b>On Behalf Of </b>Ravicz, Mike<br><b>Sent:<= /b> Thursday, May 26, 2011 4:13 PM<br><b>To:</b> AUDITORY@xxxxxxxx<b= r><b>Subject:</b> Re: [AUDITORY] looking for recommendation for in-ear micr= ophones<o:p></o:p></span></p></div></div><p class=3DMsoNormal><o:p>&nbsp;</= o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p style=3D'margin-bottom= :12.0pt'><span style=3D'font-size:10.0pt'>Hello Michael,<br><br>We have use= d Knowles miniature microphones &lt;<a href=3D"http://www.knowles.com/searc= h/product.htm?x_sub_cat_id=3D8">http://www.knowles.com/search/product.htm?x= _sub_cat_id=3D8</a>&gt; for many years for many purposes, including in-ear = sound pressure recordings.&nbsp; We used a probe tube (as do most other peo= ple who make such recordings), which can cause noise floor problems at high= frequencies.&nbsp; The fairly new FG series of microphones from Knowles is= small enough that you could probably put the entire microphone in the ear = canal without affecting the sound field too much.&nbsp; (I see that the GA = series is even smaller, but we have not used them yet.)&nbsp; I assume that= this is for human subjects.<br><br>Best regards,<br>&nbsp;&nbsp; Mike<br><= br>Mike Ravicz, Eaton-Peabody Lab., Mass. Eye &amp; Ear Infirmary, Boston M= A 02114<br>+1 (617) 573-5591; +1 (617) 720-4408 FAX<br>&quot;In theory, the= re is no difference between theory and fact; but in fact, there is.&quot; -= someone</span><o:p></o:p></p></div></body></html>= --_000_D0340F82AB98CD4D8AF22F6DAC9EB8E94B09DC1EBDSTARKEYMAILms_--


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