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The Basement
sensitivity of these two microphones
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<blockquote data-quote="David Morison" data-source="post: 217603" data-attributes="member: 2076"><p>In case you don't feel like googling, the Inverse Square Law basically means that sound gets quieter by 6dB every time we double the distance form the source to the mic.</p><p></p><p>So let's put some numbers to the headset vs lav comparison.</p><p></p><p>We'll assume that we can get the tip of the headset mic to about 2cm from the mouth.</p><p>A typical lav placement on a lapel etc might have the element approx 20 cm away from the mouth - that's 10x further away or 3.16 doublings of distance.</p><p>That translates to ~20dB less useful signal from the lav, all else being equal.</p><p>If we boost that signal by 20dB at the mixer/recorder to get back to the same level we get from the headset, then we're also boosting any background noise by the same 20dB.</p></blockquote><p></p>
[QUOTE="David Morison, post: 217603, member: 2076"] In case you don't feel like googling, the Inverse Square Law basically means that sound gets quieter by 6dB every time we double the distance form the source to the mic. So let's put some numbers to the headset vs lav comparison. We'll assume that we can get the tip of the headset mic to about 2cm from the mouth. A typical lav placement on a lapel etc might have the element approx 20 cm away from the mouth - that's 10x further away or 3.16 doublings of distance. That translates to ~20dB less useful signal from the lav, all else being equal. If we boost that signal by 20dB at the mixer/recorder to get back to the same level we get from the headset, then we're also boosting any background noise by the same 20dB. [/QUOTE]
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sensitivity of these two microphones
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