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A guide to make a passive headset


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Hi Alan, had you considered noise cancelling electrets? If you werent aware they have openings on the back as well as front so as to cancel ambient sound to a degree. I have never experimented with them so dont know how effective they are. I have used a moving coil mic which is noise cancelling by way of similar symmetrical front and back porting which was an improvement over standard electret (although a single transistor amp stage was needed), however though air to ground is ok but air-air is just too noisy with the defenders we were using.



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