Parabolic Microphone 33 cm diameter

Mono Vs. Wide Stereo configuration

Here we compare two small parabolic microphones with a 33 cm diameter dish: a monophonic version with the microphone capsule positioned exactly at the focal point of the parabola and a stereophonic version, the latter with the capsules positioned quite outside the focal point of the parabolic dish. By adopting this stereo configuration with the capsules positioned in a “non-traditional way” (out of the focal point), we are able to have an enlargement of the background sound scene, approaching the perfect stereophonic effect that is difficult to achieve when using a parabolic microphone.
If we compare a monophonic recording see Ortolan Bunting song with a stereophonic one (see recordings by Guido Pinoli and Gianni Pavan), we immediately discover what are the differences that characterize the two types of sound recording in nature: extremely defined in the monophonic version, but without the background “sound contour”; much more pleasant as immersion in the soundstage the stereo recording with a wide background.

In other words, if we need a selective recording of a single call, song, or any other emission uttered by a subject of a single specie in view to study it by the mean of spectrograms, waveform and other parameters, we’ll use a microphone well focused inside a parabolic dish; on the other hand, to obtain a recording of a subject well inserted in its soundscape (which represents the photograph of the environment we are investigating), we need to use a stereo recording, better if a parabolic stereo microphone system wide focused.