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Re: Ls5 and external phantom power

Subject: Re: Ls5 and external phantom power
From: picnet2
Date: Mon Jun 9, 2014 10:06 am ((PDT))
Hi Zach,              Thank you for the feedback, Im glad the blog inspires 
experimentation. The PIP conversion should work for any permanently polarised 
condenser, i.e an electret based mic. The spider in the bag is actually on 
topic. I watched a show where they were trying to record insects with some 
hydrophones but failed to consider the mass of the glass sheet vs the dynamics 
of the movement.  Optical is far better e.g with a small laser vibrometer "spy 
scope" its possible to listen to the sound of pollen grains tumbling in a rain 
drop. Small sighting telescope, laser behind the main objective, photodiodes 
(pip powered) behind the eyepiece, line them up reflecting from the surface of 
interest. simply shine it to mylar and capture the amplitude modulated (the 
sheet) reflection. Range is limited to about 6" due to the main objective. Its 
possible to bring the device in close to form a bright spot and analyse the 
roughness of dust, pollen, feathers etc by moving the laser over them quickly.










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