Firstly, musical instruments are voiced to be heard from
the outside whereas internally, body sounds usually offer
excessive mid/bass boom
Secondly, Mics are meant to be used in free air where
sound waves travel mainly from the front of a diaphragm
to the rear whereas inside instruments, sound reflections
and partial cancellations from standing waves may cause
phasing problems, causing a swirling effect and
preventing clarity
Finally, the placement of a Mic inside a resonant
chamber may produce uneven peaks and a tendency to
low frequencies making them highly prone to feedback
TESTING OR PERFORMANCE?
Musicians should bear
in mind that they might judge the sound of an internal Mic
at very low volumes but will often find it completely
unusable at typical live performance volumes or in
difficult acoustic conditions, even at low volumes
BLENDING:
If you try to blend in some Mic you may be
severely constrained by stage sound pressure levels
P.38
