slightly ot: battery driven microphone

[Martin Czech]

I need a (condenser) microphone with good frequency response and noise
specs, which should also run with battery for outdoor or portable things,
48V as well.

Very often these thing have cardioide or hyper-cardioide, but seldom
spheroid characteristic.

As you migt have guessed, I need that for better recording of room
responses.  I don't know which characteristic is needed , I guess
spheroid, but a switchable char., would be nice anyway.


Due to the correlation technique (thanx Magnus and Ingo!)  the quality of
speaker and microphone are not that important, but good hardware always
is a good idea.

Ladies and Gentlemen, could you please recommend such a microphone for me?
I'm not very experienced with microphones.

m.c.