Basic preamps wanted
 

On Tue, 7 Jul 2009 10:45:22 +0100, "TonyL"
wrote:

Suggestion...find out what your customer really wants. For example....


I do know *exactly* what the customer wants, which is to eliminate
low- and high-frequency machinery noise from an operator's microphone.
I have ordered the FBQ8000 which are probably overkill but are
guaranteed to do the job and are much cheaper than I would charge for
my time in building something suitable.
Thanks to everyone for their help.

Basic preamps wanted
 

"JohnTurd"

Suggestion...find out what your customer really wants. For example....


I do know *exactly* what the customer wants, which is to eliminate
low- and high-frequency machinery noise from an operator's microphone.

** ********.

The machine noise that is interfering with speech intelligibility is in the
same band as the voice - filtering will not help.

Have neither of you DICKHEADS ever noticed how easily a phone
conversation is affected by ambient noise?


I have ordered the FBQ8000 which are probably overkill


** Total waste of money.

There IS one born every minute... .


...... Phil

Basic preamps wanted
 

On Wed, 8 Jul 2009 11:41:08 +1000, "Phil Allison"
wrote:


"JohnTurd"

Suggestion...find out what your customer really wants. For example....


I do know *exactly* what the customer wants, which is to eliminate
low- and high-frequency machinery noise from an operator's microphone.

** ********.

The machine noise that is interfering with speech intelligibility is in the
same band as the voice - filtering will not help.

Have neither of you DICKHEADS ever noticed how easily a phone
conversation is affected by ambient noise?


I have ordered the FBQ8000 which are probably overkill


** Total waste of money.

There IS one born every minute... .


..... Phil

Have you tried engaging your diseased brain before opening your
stinking cess-pit of a mouth?

As it happens, I have done a full spectrum analysis of the audio from
that microphone. The worst components are between 100 - 250 Hz, and
these peak at 6dB above the voice. Then there are a range of
components between 1 - 10 kHz which are all about the same peak level
as the voice. Also the existing system is a bit low on gain.

By putting in suitable filtering I can remove all of the heavy noise
below the voice band and remove the rubbish above it. Yes, the in-band
components will remain, but I have done a number of tests using
recordings of the audio with a graphic equaliser on a PC, and careful
filtering *greatly* increases readability - the customer was most
impressed.
I cannot get access to the mic, which is built into an equipment
panel. The customer cannot accept machine downtime to facilitate a
rebuild, so I can only play with the audio further down the line.

This is my last comment on the matter, so now you can F**K OFF and get
the serious medical treatment that you so urgently need.