Sunday, September 4, 2016

Pleiades 3D microphone

Your own risk.


On the Pleiades 3D microphone the capsules are carefully fitted inside our ears just like in ear headphones.


In ear microphones.


What is recorded is what somebody's ears would capture in the sound field.


Everything gives a clue, hair, skin etc as they influence the sound field and give clues to our brain.


The recording is played back by headphones. The right headphone plays what the right ear mic have recorded and similarly for left.


How the Pleiades microphone is made.


We need small mics.


We can remove the driver units of ordinary in ear headphones. We can then fit small mic capsules facing in the outside direction, solder the leads insulate thoroughly and they are ready. The headphones should be made open back.


Mics can be (preferably?) omnidirectional as they do not introduce bass exaggeration when close just like our own ears


If we use electret condenser capsules we solder insulate thoroughly and are ready to go.


We could use dynamic capsules and a candidate could be the headphone drive unit itself but placed the other way round. Its impedance is 8 ohms so it needs to be stepped up by an audio transformer and then drive a Pleiades K117 JFET preamplifier. An audio transformer relatively easy to make is the Pleiades transformer wound on Magnetec Nanocrystalinne core. 2 separate insulated windings should be used for isolation in each transformer. The impedance is stepped as the square of the turn ratio. Primary winding turns adjust how deep it goes in bass frequencies.


We must take all precautions to prevent metal parts touching our ears, isolate with audio transformers and everything needed to prevent an accident in case something goes wrong.


If done correctly the reproduction is as exceptional as possible.


We must never forget that no matter how realistic virtual reality can be the smile of a real person (physically in front) the caress of a real person the touch and smell and thoughts of a real person and the sharing of these asking nothing in return is the joy of giving for the sake of it and it may be called love.

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