[sdiy] Brain filling in fundamental

[cheater cheater]

Andre,
so you're saying this is merely a mechanical impedance mismatch?
Same reason why the rotary woofer works as well as it does?

Best regards,
Damian

On Sat, Jul 19, 2008 at 8:22 AM, Andre Majorel <aym-htnys at teaser.fr> wrote:
> On 2008-07-16 20:47 +0100, cheater cheater wrote:
>
>> Isn't it that under a certain frequency certain to the object in
>> question objects will stop vibrating at the fundamental but
>> still 'pretend' to vibrate? Excuse my terrible language here,
>> I'm not even sure how to explain this properly. I do believe
>> that this is a less or more known phenomenon...
>>
>> Isn't that why electric bass guitars sound this 'harsh'
>
> Harsh ? When unamplified, you mean ?
>
>> - because the guitar body itself would have to be much larger to
>> 'house' the fundamental?
>
> It's the string that oscillates. The body just follows, and a
> small body can be made to vibrate at 41 Hz, or 0.00041 Hz for that
> matter, just as well as a large body.
>
> The problem is that the "diameter" of the small body is small
> compared to the wave length of 41 Hz in air (8.3 m) and as a
> result, it is not good at making the air around it vibrate at that
> frequency.
>
> Now, if you place your head against the body of an electric bass,
> you'll hear a very strong fundamental. Making contact with the
> body eliminates the impedance mismatch at the body-air interface.
>
> --
> André Majorel <URL:http://www.teaser.fr/~amajorel/>
> Do not use this account for regular correspondence.
> See the URL above for contact information.
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