--- In Walter Knapp <>
wrote:
> I wonder what it's frequency response would be combined with a
> parabola. The jaggies also have a look of some of the things
sennheiser
> dealt with making the MKH-800. All those reflections off tiny
surfaces.
As we have seen recently, a parabolic dish should work satisfying at
higher frequencies, especially in the ultrasonic domain (where the
dish could be smaller). Reflections and resonance within the
microphone capsule are responsible for the distortions of the
frequency response at the upper edge.
A problem in recording fast-flying bats could be the strong
directionality of a parabolic microphone. Several bat species (those
feeding close to vegetation) have zigzag-shaped flight paths, where
it would be extremely difficult to track a single bat (especially at
total darkness). But it might be possible for species flying more
straight ahead at higher altitudes at dusk.
I still have not tried my new Telinga Universal for bats because
they are still sleeping here. However, they should appear within the
next few days.
There should be no problems in recording stationary grasshoppers. I
know that several researchers have used parabolic reflectors
successfully for locating and recording bush crickets and cicadas:
http://www2.arnes.si/~ljprirodm3/cikade.html
Raimund
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