Re: mechanical cochlear model

[Lina Reiss <reiss@xxxxxxxx>]

There is a mechanical model similar to what you describe at the University of Utah:
http://www.bioen.utah.edu/faculty/RDR/index.php?cat_id=3&pti=11

They cite the following paper for the passive version of the model:
R. Keolian (1991), J. Acoust. Soc. Am. 89

Hope this helps!

Lina


Lina A.J. Reiss, Ph.D.
Assistant Professor of Otolaryngology
Oregon Hearing Research Center
Oregon Health & Science University
reiss@xxxxxxxx
________________________________________
From: AUDITORY - Research in Auditory Perception [AUDITORY@xxxxxxxxxxxxxxx] On Behalf Of AUDITORY automatic digest system [LISTSERV@xxxxxxxxxxxxxxx]
Sent: Tuesday, March 02, 2010 9:14 PM
To: AUDITORY@xxxxxxxxxxxxxxx
Subject: AUDITORY Digest - 26 Feb 2010 to 2 Mar 2010 (#2010-47)

There are 5 messages totalling 364 lines in this issue.

Topics of the day:

  1. mechanical cochlear model (3)
  2. paper request
  3. Deadline Extension to March 22: Call for Workshop Proposals IEEE ICSC 2010

----------------------------------------------------------------------

Date:    Tue, 2 Mar 2010 14:41:20 +0100
From:    Christian Kaernbach <auditorylist@xxxxxxxxxxxx>
Subject: mechanical cochlear model

Hi everybody,

I ponder whether I should have our workshop build a mechanical cochlear=20
model, filled with water, made from acrylic glass, in a simple box-like=20
arrangement (no coil, rectangular cross section), with oval and round=20
windows covered with latex foil (such as the middle division screen,=20
i.e. the "basilar membrane") and some crank lever and maybe a gear=20
transmission that would allow to enter mechanical waves at different=20
frequencies. I would use it in the lecture room to illustrate the=20
B=E9k=E9sy's travelling wave model. (I realize that he had build such a=20
model himself, which was not meant for class room use as I understood it.=
)

Is there anybody out there who has / knows such a model and could give=20
advice as to dimensions and material?

Best,
Chris
------
Christian Kaernbach
Allgemeine Psychologie
Institut f=FCr Psychologie
Christian-Albrechts-Universit=E4t zu Kiel
Olshausenstr. 62
D-24098 Kiel
Germany
www.kaernbach.de

------------------------------

Date:    Tue, 2 Mar 2010 16:31:34 +0000
From:    Cris Lanting <c.lanting@xxxxxxxxx>
Subject: paper request

Dear List,

I'm searching for the next paper:
Winkler I, Reinikainen K, N=E4=E4t=E4nen R (1993) Event-related brain =20=

potentials reflect traces of echoic memory in humans. Percept =20
Psychophys 53: 443-449.

Can someone please share this paper?

Thank you very much in advance!

Cris Lanting


-----
Cris Lanting
MRC Institute of Hearing Research
University Park
NG7 2RD Nottingham

phone: +44 (0)115 922 3431
fax: +44 (0)115 951 8503
cris@xxxxxxxxxxxxx

------------------------------

Date:    Tue, 2 Mar 2010 09:00:40 -0800
From:    Dana Massie <dmassie@xxxxxxxxxxxx>
Subject: Re: mechanical cochlear model

Look at the marvelous exhibit from the San Francisco Exploratorium:

Visible Effects of The Invisible:

http://exs.exploratorium.edu/exhibits/visible-effects-of-the-invisible/

This is the most vivid example I have seen of standing waves in a tube. I
wonder how differently this tube would behave if it were conical.

Dana Massie

>From the web site:

Visible Effects of the Invisible graphically demonstrates resonant
frequencies. A horizontal, clear glass tube is partially with clear fluid.
Sound generated by a speaker housed at one end of the tube causes the air i=
n
the tube to vibrate and geysers appear in the fluid where the motion of air
is greatest. The geysers are generated at various sections of the tube by
the adjusting the resonant frequency of the speaker which causes pressure
differentials.



On 3/2/10 5:41 AM, "Christian Kaernbach" <auditorylist@xxxxxxxxxxxx> wrote:

> Hi everybody,
>=20
> I ponder whether I should have our workshop build a mechanical cochlear
> model, filled with water, made from acrylic glass, in a simple box-like
> arrangement (no coil, rectangular cross section), with oval and round
> windows covered with latex foil (such as the middle division screen,
> i.e. the "basilar membrane") and some crank lever and maybe a gear
> transmission that would allow to enter mechanical waves at different
> frequencies. I would use it in the lecture room to illustrate the
> B=E9k=E9sy's travelling wave model. (I realize that he had build such a
> model himself, which was not meant for class room use as I understood it.=
)
>=20
> Is there anybody out there who has / knows such a model and could give
> advice as to dimensions and material?
>=20
> Best,
> Chris
> ------
> Christian Kaernbach
> Allgemeine Psychologie
> Institut f=FCr Psychologie
> Christian-Albrechts-Universit=E4t zu Kiel
> Olshausenstr. 62
> D-24098 Kiel
> Germany
> www.kaernbach.de

--
Dana Massie
Director of DSP Architecture
Audience, Inc.
+1 (831) 295-0079 mobile
dmassie@xxxxxxxxxxxx
=20

------------------------------

Date:    Wed, 3 Mar 2010 10:00:10 +1100
From:    "Andrew Bell (uni account)" <andrew.bell@xxxxxxxxxx>
Subject: Re: mechanical cochlear model

Dana is pointing to a demonstration in which a closed tube displays
resonance, whereas Christian would like to constuct a chamber in which
traveling waves are generated.

The pertinent question, of course, is: on which principle does the real
cochlea operate?

I have written a paper that compares traveling waves and resonance in the
cochlea, and it is available at

http://www.plosbiology.org/article/info:doi%2F10.1371%2Fjournal.pbio.0020=
337

I believe that resonance is the preferred principle because it is more
sensitive: it allows energy to build up over many cycles. The
Exploratorium's demo giving a startling example of what can happen.

The problem with the traveling wave is that it is relatively inefficient.
It is hard to transfer acoustic energy from the fluid to the partition. I=
n
the physical models I have seen (including B=E9k=E9sy's), the model is
compromised by having fluid in the bottom half and air in the top - this
is sort of cheating in that it is not the situation in the real cochlea,
which is filled totally with liquid. Chris, I challenge you to produce a
traveling wave model with fluid in both upper and lower halves!

Andrew.


Andrew Bell
Research School of Biology
Australian National University
Canberra, ACT 0200


On Wed, March 3, 2010 4:00 am, Dana Massie wrote:
> Look at the marvelous exhibit from the San Francisco Exploratorium:
>
>
> Visible Effects of The Invisible:
>
>
> http://exs.exploratorium.edu/exhibits/visible-effects-of-the-invisible/
>
>
> This is the most vivid example I have seen of standing waves in a tube.=
 I
>  wonder how differently this tube would behave if it were conical.
>
> Dana Massie
>
>
> From the web site:
>
>
> Visible Effects of the Invisible graphically demonstrates resonant
> frequencies. A horizontal, clear glass tube is partially with clear flu=
id.
>  Sound generated by a speaker housed at one end of the tube causes the
> air in the tube to vibrate and geysers appear in the fluid where the
> motion of air is greatest. The geysers are generated at various section=
s
> of the tube by the adjusting the resonant frequency of the speaker whic=
h
> causes pressure differentials.
>
>
>
> On 3/2/10 5:41 AM, "Christian Kaernbach" <auditorylist@xxxxxxxxxxxx>
> wrote:
>
>
>> Hi everybody,
>>
>>
>> I ponder whether I should have our workshop build a mechanical cochlea=
r
>>  model, filled with water, made from acrylic glass, in a simple
>> box-like arrangement (no coil, rectangular cross section), with oval a=
nd
>> round windows covered with latex foil (such as the middle division
>> screen, i.e. the "basilar membrane") and some crank lever and maybe a
>> gear transmission that would allow to enter mechanical waves at
>> different frequencies. I would use it in the lecture room to illustrat=
e
>> the B=E9k=E9sy's travelling wave model. (I realize that he had build s=
uch a
>> model himself, which was not meant for class room use as I understood
>> it.)
>>
>> Is there anybody out there who has / knows such a model and could give
>> advice as to dimensions and material?
>>
>> Best,
>> Chris
>> ------
>> Christian Kaernbach
>> Allgemeine Psychologie
>> Institut f=FCr Psychologie
>> Christian-Albrechts-Universit=E4t zu Kiel
>> Olshausenstr. 62
>> D-24098 Kiel
>> Germany
>> www.kaernbach.de
>
> --
> Dana Massie
> Director of DSP Architecture
> Audience, Inc.
> +1 (831) 295-0079 mobile
> dmassie@xxxxxxxxxxxx
>
>

------------------------------

Date:    Wed, 3 Mar 2010 01:13:00 +0100
From:    =?iso-8859-1?Q?=22Schuller=2C_Bj=F6rn=22?= <schuller@xxxxxx>
Subject: Deadline Extension to March 22: Call for Workshop Proposals IEEE ICSC 2010

Dear List,

for those of you interested:

______________________________________________________________

Call for Workshop Proposals

IEEE ICSC 2010:=20
The Fourth IEEE International Conference on Semantic Computing

Pittsburgh, PA, USA=20
September 22-24, 2010=20

http://www.ieee-icsc.org/
______________________________________________________________


The IEEE ICSC 2010 organizing committee invites proposals for workshops to =
be held in conjunction with the conference. The workshops will focus on spe=
cific topics of the main conference. The organizer(s) of approved workshops=
 are responsible for advertising the workshop, distributing the call for pa=
pers, gathering submissions, and conducting the paper review process.

Workshop proposals must include:=20
1. The name of the workshop, a statement of goals and a list of topics for =
the workshop.=20
2. The name(s) and affiliation(s) of the organizer(s).=20
3. The names of potential program committee members.=20
4. The duration of the workshop (full day or half day) and the expected num=
ber of papers to be accepted.
5. A brief description of how the proposed workshop could complement the ma=
in conference scopes.

The selection of the workshops to be included in the final ICSC program wil=
l be based upon a number of factors, including: the scientific/technical in=
terest of the topics, the quality of the proposal, the need to avoid strict=
ly overlapping workshops, and the unavoidable need to limit the overall num=
ber of selected workshops.=20

Researchers and practitioners are invited to submit workshop proposals to t=
he workshop co-chairs:

Christian Bauckhage, Fraunhofer IAIS, Germany

Asli Celikyilmaz, University of California, Berkeley, USA

Ian Oliver, Nokia, Finland

Balakrishnan Prabhakaran, University of Texas at Dallas, USA

Bj=F6rn Schuller, Technische Universit=E4t M=FCnchen, Germany

Mark D. Wood, Eastman Kodak, USA

at

icscwork@xxxxxxxxx


no later than March 22, 2010. Submission should be made by e-mail (PDF or A=
SCII) with "ICSC2010 Workshop Submission" in the subject header. Notificati=
on of acceptance will be made by April 19, 2010.


Our apologies if you receive multiple copies of this message,

Thank you and best,


Christian Bauckhage, Asli Celikyilmaz, Ian Oliver, Balakrishnan Prabhakaran=
, Mark D. Wood, and Bj=F6rn Schuller


___________________________________________

Dr. Bj=F6rn Schuller
Senior Researcher and Lecturer

LIMSI-CNRS
BP133 91403 Orsay cedex
France

Technische Universit=E4t M=FCnchen
Institute for Human-Machine Communication
D-80333 M=FCnchen

schuller@xxxxxxxx
___________________________________________

------------------------------

End of AUDITORY Digest - 26 Feb 2010 to 2 Mar 2010 (#2010-47)
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