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Re: tympanometry probe tone level?

It depends on the probe tone frequency and it is usually set at a level below the level the elicit the aural reflex. It varies a bit between manufacturer; however, it is close the the following values.
 226 Hz @ 85dB SPL ± 1.5dB
 1000 Hz (a probe tone frequency of choice for infant assessment) @ 75dB SPL ± 1.5dB
Hope this helps.
Navid Shahnaz, Ph.D
Assistant Professor
School of Audiology & Speech Sciences
Faculty of Medicine
5804 Fairview Ave.
Vancouver, B.C. V6t 1Z3
Tel. 604-822-5953
Fax. 604-822-6569
E-mail: nshahnaz@xxxxxxxxxxxxxxxxxx
Website: http://www.audiospeech.ubc.ca/school/faculty/navid/

---------- Original Message ----------------------------------
From: "Ferguson, Sarah Hargus" <safergus@xxxxxx>
Reply-To: "Ferguson, Sarah Hargus" <safergus@xxxxxx>
Date:          Thu, 31 Aug 2006 10:08:03 -0500

>Hello list! Students ask the darnedest questions. Today in Intro to
>Audiology, one of the students asked what the presentation level is for
>the probe tone used in tympanometry. I didn't find it in a quick Google
>search (not even a manufacturers' specs I looked at) or during a quick
>peek in a classic audiology textbook - perhaps someone out there knows
>off-hand what it is? 
>~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 
>Sarah Hargus Ferguson, Ph.D., CCC-A
>Assistant Professor
>Department of Speech-Language-Hearing: Sciences and Disorders 
>University of Kansas 
>Dole Center 
>1000 Sunnyside Ave., Room 3001 
>Lawrence, KS  66045
>office: (785)864-1116
>Speech Acoustics and Perception Lab: (785)864-0610 

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