Tuesday, February 7, 2017

A pair of Electro-Voice 635a as binaural 3D microphones

Using possibly the simplest signal path analog recording.


The microphones were held by hand next to each ear, pointing to various directions.


Most directions sounded great, even both mics pointing toward each ear.


So great that while playback the recorder had to be stopped many times to figure out if the ambient sound was happening now or was the one that had been recorded.


It was amazing that what was thought to be real was in fact recorded.


Pleiades filters (just 82mH in parallel with each mic's output) did an excellent job of giving a flat frequency response to listeners brain, by gently compensating exaggerated bass in the signal path. 333mH was also tried being somewhat bass heavy.


Signal path:


Ambience - right channel 635a on right ear - Pleiades 82mH -

                         - SONY TCD5 Pro II - Sennheiser HD580 - ears - brain

Ambience - left channel 635a on left ear - Pleiades 85mH -









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