Date: Fri Aug 28 10:37:21 2009 Back to Contents ------------------------------------------------------------------------

Author: Wallin, Stephen R

Subject: Re: Sound Bites

Post:

Hello Pam,

With deep auditory nerve conduction, they have to do completely different tests. Still even the auditory brainstem test misses a lot, like for instance even the afferent/efferent distinction and the vestibular interaction plexus. When I asked at the Children's Hospital about why fMRI studies are not performed on the auditory brainstem, the answer I got was that the relays occurring between the many auditory nuclei are too fast of events. Is anyone out there doing work with medical events?

Stephen

-----Original Message-----
From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On Behalf Of Pamela Dupuis
Sent: Friday, August 28, 2009 6:44 AM
To: tap-l@lists.ncsu.edu
Subject: Re: [tap-l] Sound Bites

Audiologists have a device to test one's hearing through bone
conduction. It has a small piece that is held behind one's ear; feel the
spot with your fingers, the skull is just thinly covered there. It is
not new, so perhaps you might find an inexpensive older/used one.
Pj Dupuis

Daniel Kaplan wrote:
> I just came back from a vacation in London where I visited their
> Science museum. One of the exhibits would be cool to reproduce in my
> high school class as a demo that the students could "bite into". The
> demo consisted of a thin metal rod that was held horizontally at one
> end by some sort of apparatus. The workings of the apparatus were
> not visible.
>
> The user was told to unwrap a clean straw from a stack of available
> straws (they had special straws that were shorter than usual - I could
> have the student cut down a standard straw) and slide it over the rod.
> The next step was to put your fingers in your ears and bite on the
> straw. You could then clearly hear some local radio station.
>
> This is a great demo to show how sound is a transmitted vibration. To
> set this up I will need a mechanism to hold the rod quite stiffly but
> still be able to transmit vibrations to it. I was thinking I would
> try mounting a small speaker on a rod. Maybe if I remove the cone
> portion of the speaker I could get vibrations without too much sound.
> transmitted through the air.
>
> Does anyone have suggestions about how to accomplish this? Or has
> anyone built a similar demo that they could share some of the details?
>
> Thanks.
>
> Dr. Daniel Kaplan
> Physics Teacher
> Matawan Regional High School, Aberdeen, NJ
>



From tap-l-owner@lists.ncsu.edu Fri Aug 28 10:37:21 2009

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