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The Range
Gear Talk
Noise Canceling Electronic Ear Muffs
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<blockquote data-quote="NightShade" data-source="post: 3178218" data-attributes="member: 29706"><p>If I remember correctly ANR is generally best for sounds that are constantly nearby and generally similar low frequency noise, like the drone of an engine which is why they are very useful for aircraft. </p><p></p><p>Things like gunfire can work but sometimes to a lesser degree because the sound is higher in pitch and intermittent and random. The ANR ones for gunfire are also going to cost over 100 bucks and when the circuitry is unable to eliminate the sound they will cut out like the cheapo's.</p><p></p><p>The way ANR works is a microphone pics up the sound and then a corresponding sound is played back 180 degrees out of phase to cancel out the initial sound. The thing is that it takes time for the circuitry to pick up the sound process it and then generate the out of phase sound.</p></blockquote><p></p>
[QUOTE="NightShade, post: 3178218, member: 29706"] If I remember correctly ANR is generally best for sounds that are constantly nearby and generally similar low frequency noise, like the drone of an engine which is why they are very useful for aircraft. Things like gunfire can work but sometimes to a lesser degree because the sound is higher in pitch and intermittent and random. The ANR ones for gunfire are also going to cost over 100 bucks and when the circuitry is unable to eliminate the sound they will cut out like the cheapo's. The way ANR works is a microphone pics up the sound and then a corresponding sound is played back 180 degrees out of phase to cancel out the initial sound. The thing is that it takes time for the circuitry to pick up the sound process it and then generate the out of phase sound. [/QUOTE]
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