I was thinking about doing some dummy head recording and the effect on
frequency response
of using an electret capsule in a model of an ear, compared to just
placing it on the surface of a head-sized sphere.

Any thoughts before I start moulding body parts in plaster?

--
Eiron.

"Eiron"

I was thinking about doing some dummy head recording


** Your own head would be the obvious & ideal candidate ...


and the effect on frequency response
of using an electret capsule in a model of an ear, compared to just
placing it on the surface of a head-sized sphere.


** Use ears just like Mr Spock's, for out of this world sound quality.


Any thoughts before I start moulding body parts in plaster?


** Like mommy said - get your hands of it.

Keep them off.



...... Phil

"Eiron" wrote in message


I was thinking about doing some dummy head recording and
the effect on frequency response
of using an electret capsule in a model of an ear,
compared to just placing it on the surface of a
head-sized sphere.

Dummy head recording is very old news.

It can only be reasonably be played on headphones.

Any thoughts before I start moulding body parts in
plaster?

Do some homework, first. Google gives 100,000 hits for "dummy head
recording".

On Thu, 16 Apr 2009 09:24:38 -0400, "Arny Krueger"
wrote:

I was thinking about doing some dummy head recording and
the effect on frequency response
of using an electret capsule in a model of an ear,
compared to just placing it on the surface of a
head-sized sphere.

Dummy head recording is very old news.

It can only be reasonably be played on headphones.

Any thoughts before I start moulding body parts in
plaster?

Do some homework, first. Google gives 100,000 hits for "dummy head
recording".

But not much on dummy head recording using a modeled ear cavity.

If you want to go a little beyond a glib put-down, Google has
interesting stuff on "ear acoustics" such as:

"Theoretical and applied external ear acoustics
Authors: B B Ballachanda
The external ear (pinna and earcanal) plays a major role in
transforming acoustic signals from free field to the tympanic membrane
in humans. It acts as a filter to reduce low frequencies, a resonator
to enhance mid frequencies (2.0 to 7.0 kHz), and a direction-dependent
filter at high frequencies to augment spatial perception. The external
ear transfer function is altered by variations in the physical
dimension of the external ear either due to individual differences or
due to mechanical obstructions such as blockages, hearing aid
placement, perforation of the tympanic membrane, and use of insert
earphone. It is significant that any change in the characteristics of
the acoustic signal can produce considerable disparity in within- and
between-individual responses. The present paper examines published
studies on sound pressure transfer function provided by the external
ear in humans.
Journal of the American Academy of Audiology"

The microphone you use will already be in a housing, designed to suit
the particular transducer used. Its "ear" if you like. So you'd be
putting an ear inside another ear. Maybe pointless? But this
shouldn't stop you trying, if the subject interests you.

"Laurence Payne" wrote in message

On Thu, 16 Apr 2009 09:24:38 -0400, "Arny Krueger"
wrote:

I was thinking about doing some dummy head recording and
the effect on frequency response
of using an electret capsule in a model of an ear,
compared to just placing it on the surface of a
head-sized sphere.

Dummy head recording is very old news.

It can only be reasonably be played on headphones.

Any thoughts before I start moulding body parts in
plaster?

Do some homework, first. Google gives 100,000 hits
for "dummy head recording".

But not much on dummy head recording using a modeled ear
cavity.

And that makes perfect sense, because the person listening to the recording
listens through a *real* ear cavity.

If you want to go a little beyond a glib put-down,

Seems like it is very much on-target.

Google has interesting stuff on "ear acoustics" such as:

Umm, you just told the guy to go google. Like I just did.

;-)

Arny Krueger wrote:

Google has interesting stuff on "ear acoustics" such as:

Umm, you just told the guy to go google. Like I just did.


You can help people through http://lmgtfy.com. It creates a URL you can
send them to help them learn to
help themselves.

Examples of uses:

"What do you mean by free market?"
http://tinyurl.com/dzyzdm

"Pneumonoultramicroscopicsilicovolcanoconiosis ? What's that?"
http://tinyurl.com/d7e4yq

"What do you mean, 'no'?"
http://tinyurl.com/cb2yed

"Arny Krueger"

Do some homework, first. Google gives 100,000 hits for "dummy head
recording".


** Nope - its only 1750 hits for the phrase.




...... Phil

"Phil Allison" wrote in message
...

"Arny Krueger"

Do some homework, first. Google gives 100,000 hits for "dummy head
recording".


** Nope - its only 1750 hits for the phrase.



I get 1,730

http://www.moirac.adsl24.co.uk/dummy.jpg


(I learned a long time ago to take Arnie's claims with a shovelful of salt -
he's like a lot of people who try to *speak with authority* when most of the
time they've no idea..!!! ;-)

"Keith Git"
"Phil Allison"
"Arny Krueger"

Do some homework, first. Google gives 100,000 hits for "dummy head
recording".


** Nope - its only 1750 hits for the phrase.


I get 1,730


** Google is censoring about 20 hits from your delicate eyes ....


(I learned a long time ago to take Arnie's claims with a shovelful of
salt - he's like a lot of people who try to *speak with authority* when
most of the time they've no idea..!!! ;-)


** Arny is a compewter geek by nature and inclination.

Like any computer, he can only manipulate the data - but not illuminate
it.




....... Phil

"Phil Anus Hole" wrote


** Google is censoring about 20 hits from your delicate eyes ....


That'll be my other half - she's probably got it set for *no titties* or
somesuch.....



(I learned a long time ago to take Arnie's claims with a shovelful of
salt - he's like a lot of people who try to *speak with authority* when
most of the time they've no idea..!!! ;-)


** Arny is a compewter geek by nature and inclination.

Like any computer, he can only manipulate the data - but not illuminate
it.


The evidence is he can't even do that accurately....