Infra sound detector device

[dipanjankar]

how can i get an infra sound detector device or instrument to record and analyse infra sounds

 

[buwish]

This topic has been moved from the section Forum Feedback to section Other Consumer Electronics by Buwish

 

[slicegan2]

# In order to get 16 good a/d bits, the circuit board must be laid out so as to minimize noise. All grounds must go to a central terminal point in a "star" configuration. All chips must have bypass capacitors on their power pins. In addition, the PIC14000 is programmed so that it goes to "sleep" during a/d operations to minimize digital noise in the circuit.

# SAMPLING RATE - The 4 MHz PIC14000 can perform 16 bit A/D at about 60 samples per second (SPS) and these samples can be averaged in software for noise rejection. I have written the firmware to allow for a dip switch selection of averaging times from 4 SPS to 35 SPS.
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