Subject: [AUDITORY] DPOAE system frequency response for testing mice From: Skyler Jennings <Skyler.Jennings@xxxxxxxx> Date: Wed, 23 May 2018 22:41:37 +0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>--_000_4A5C710244AF2E45ADA18C089FD1B9D3A779E0E1XMB10xdsumailut_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Dear list, I am helping a colleague calibrate his ABR / DPOAE system for testing audit= ory function in mice. His sound delivery and recording system includes Tuck= er Davis EC1 speakers, which are coupled to an Etymotic ER10B probe microph= one system. Recently, I measured the frequency response of the system with = a Larson Davis microphone that is rated out to 100 kHz. When I remove the = ER10B, the output of the speakers matches the expected frequency response b= ased on TDT's specifications. When the ER10B is in place, the system output= rolls off above 10 kHz. Etymotic designed the ER10B for testing in humans,= and it is rated out to 10 kHz; however, I have been made aware of several = publications that used this probe for testing in mice. Have any of you succ= essfully coupled EC1 speakers to an ER10B probe and achieved a flat frequen= cy response out to 32 kHz? If so, I am hoping you will share some insights = you have on achieving such a frequency response with this system. Sincerely, Skyler -- Skyler G. Jennings, Ph.D., Au.D. CCC-A Assistant Professor Department of Communication Sciences and Disorders College of Health University of Utah 390 South 1530 East Suite 1201 BEHS Salt Lake City, UT 84112 801-581-6877 (phone) 801-581-7955 (fax) skyler.jennings@xxxxxxxx<mailto:skyler.jennings@xxxxxxxx> --_000_4A5C710244AF2E45ADA18C089FD1B9D3A779E0E1XMB10xdsumailut_ 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=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"= > <meta name=3D"Generator" content=3D"Microsoft Word 15 (filtered medium)"> <style><!-- /* Font Definitions */ @xxxxxxxx {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4;} @xxxxxxxx {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:11.0pt; font-family:"Calibri",sans-serif;} a:link, span.MsoHyperlink {mso-style-priority:99; color:#0563C1; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:#954F72; text-decoration:underline;} span.EmailStyle17 {mso-style-type:personal-compose; font-family:"Calibri",sans-serif; color:windowtext;} .MsoChpDefault {mso-style-type:export-only; font-family:"Calibri",sans-serif;} @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=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72"> <div class=3D"WordSection1"> <p class=3D"MsoNormal">Dear list,<o:p></o:p></p> <p class=3D"MsoNormal"><o:p> </o:p></p> <p class=3D"MsoNormal">I am helping a colleague calibrate his ABR / DPOAE s= ystem for testing auditory function in mice. His sound delivery and recordi= ng system includes Tucker Davis EC1 speakers, which are coupled to an Etymo= tic ER10B probe microphone system. Recently, I measured the frequency response of the system with a Larson Da= vis microphone that is rated out to 100 kHz. When I remove the ER10B,= the output of the speakers matches the expected frequency response based o= n TDT’s specifications. When the ER10B is in place, the system output rolls off above 10 kHz. Etymotic designed t= he ER10B for testing in humans, and it is rated out to 10 kHz; however, I h= ave been made aware of several publications that used this probe for testin= g in mice. Have any of you successfully coupled EC1 speakers to an ER10B probe and achieved a flat frequency respo= nse out to 32 kHz? If so, I am hoping you will share some insights you have= on achieving such a frequency response with this system.<o:p></o:p></p> <p class=3D"MsoNormal"><o:p> </o:p></p> <p class=3D"MsoNormal">Sincerely,<o:p></o:p></p> <p class=3D"MsoNormal"><o:p> </o:p></p> <p class=3D"MsoNormal">Skyler <o:p></o:p></p> <p class=3D"MsoNormal"><o:p> </o:p></p> <p class=3D"MsoNormal"><span style=3D"color:#1F4E79">--<o:p></o:p></span></= p> <p class=3D"MsoNormal"><span style=3D"color:#1F4E79">Skyler G. Jennings, Ph= .D., Au.D. CCC-A<o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"color:#1F4E79">Assistant Professor<o:= p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"color:#1F4E79">Department of Communic= ation Sciences and Disorders <o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"color:#1F4E79">College of Health Univ= ersity of Utah<o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"color:#1F4E79">390 South 1530 East<o:= p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"color:#1F4E79">Suite 1201 BEHS<o:p></= o:p></span></p> <p class=3D"MsoNormal"><span style=3D"color:#1F4E79">Salt Lake City, UT 841= 12<o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"color:#1F4E79">801-581-6877 (phone)<o= :p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"color:#1F4E79">801-581-7955 (fax)<o:p= ></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"color:#1F4E79"><a href=3D"mailto:skyl= er.jennings@xxxxxxxx"><span style=3D"color:#1F4E79">skyler.jennings@xxxxxxxx= .utah.edu</span></a><o:p></o:p></span></p> <p class=3D"MsoNormal"><o:p> </o:p></p> </div> </body> </html> --_000_4A5C710244AF2E45ADA18C089FD1B9D3A779E0E1XMB10xdsumailut_--