I wonder if what you're hearing as pressure waves, is what we'd call
'mic bumps', some mechanical vibration transfered to the mic through
the equipment you're using to hand-hold. Often they appear as low
frequency 'thumps', which I suppose could be confused for wind
overloading a mic, although that is usually much stronger and noticable.
If you have the ability in the computer, try rolling off the low end
frequencies below about 100Hz and see if that eliminates the sound. If
so, then what you're hearing is probably mechanical vibrations that
the mics are picking up.
Tim
On Mar 22, 2008, at 6:27 AM, Jatinder Singh wrote:
> Hello All,
> I am new to recording nature/ bird sounds.
> I was recording birds at the edge of a large lake, and upon review
> of the recording I notice "pressure waves" in the recording. It was
> not windy during the recording. I am using ME66 microphone equipped
> with a sponge windscreen in association with a MZRH1 recorder, the
> whole contraption is hand held.
> Could anyone please educate me on these "pressure waves" and help me
> eliminate them in future.
> Thank you
> Jatinder
>
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