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Junior Varsity
CLOSED. Suggestions for microphones
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<blockquote data-quote="Art Welter" data-source="post: 214800" data-attributes="member: 52"><p>Glenn, you may have already read this, but if not, it explains why you still will have little chance of success, even if a creature smart enough to escape detection was also stupid enough to clumsily break branches, which would result in high frequency impulse noise:</p><p></p><p>[URL unfurl="true"]https://www.wildtronics.com/parabolicarticle.html[/URL]</p><p><em></em></p><p><em>"A Parabolic dish is much like the analogy of a telephoto camera lens, at greater distances, more magnification is offered, but with a narrower field of view. Polar angle is about 90 degrees at 500Hz, closing down proportional with frequency to only 4-5 degrees at 10KHz. You will need to point the dish within 2 degrees (10 feet at 100 yards) if you want to retain the high frequency response."</em></p><p></p><p>Basically, what you are hoping for is your elusive guest happens to make it's clumsy mistake within four cardinal points the size of a motorcycle at the distance of a football field. And even if that remote bit of luck were to occur, like identifying a single hand clap or hiccough from a moving person in a full football stadium stand, unless that noise happens to be louder than the background noise generated in the foreground and background, it may as well never happened.</p></blockquote><p></p>
[QUOTE="Art Welter, post: 214800, member: 52"] Glenn, you may have already read this, but if not, it explains why you still will have little chance of success, even if a creature smart enough to escape detection was also stupid enough to clumsily break branches, which would result in high frequency impulse noise: [URL unfurl="true"]https://www.wildtronics.com/parabolicarticle.html[/URL] [I] "A Parabolic dish is much like the analogy of a telephoto camera lens, at greater distances, more magnification is offered, but with a narrower field of view. Polar angle is about 90 degrees at 500Hz, closing down proportional with frequency to only 4-5 degrees at 10KHz. You will need to point the dish within 2 degrees (10 feet at 100 yards) if you want to retain the high frequency response."[/I] Basically, what you are hoping for is your elusive guest happens to make it's clumsy mistake within four cardinal points the size of a motorcycle at the distance of a football field. And even if that remote bit of luck were to occur, like identifying a single hand clap or hiccough from a moving person in a full football stadium stand, unless that noise happens to be louder than the background noise generated in the foreground and background, it may as well never happened. [/QUOTE]
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CLOSED. Suggestions for microphones
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