 | | Re: Ultrasonic proximity sensor —Jim Choate
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| | | (...) The frequency at which air is best matched is about 40kHz, several things with this: - low resolution because of the low frequency - going to take more power to get a given range of detection than using a commercial grade unit (works at 40kHz) (...) (21 years ago, 20-Nov-03, to lugnet.robotics)
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| | | | | Re: Ultrasonic proximity sensor —michael shiloh
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| | | | | (...) back up alarms for dogcatchers and photographers... (21 years ago, 20-Nov-03, to lugnet.robotics)
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| | | | | Re: Ultrasonic proximity sensor —Mark Tarrabain
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| | | | (...) Indeed. 24khz for audio is too low. It should be at least 40khz if it's using sound. (btw, what frequencies do bats use?) >> Mark (21 years ago, 21-Nov-03, to lugnet.robotics)
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| | | | | | Re: Ultrasonic proximity sensor —Jim Choate
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| | | | | (...) Many different ones, ranging from clearly audible to much more than 40kHz. Depends on what they're doing. -- -- Open Forge, LLC 24/365 Onsite Support for PCs, Networks, & Game Consoles 512-695-4126 (Austin, Tx.) help@open-forge.com (...) (21 years ago, 21-Nov-03, to lugnet.robotics)
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| | | | | | Re: Ultrasonic proximity sensor —Chris Phillips
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| | | | (...) Right. The word ultrasonic means "higher than sonic" or above the 40KHz top end of the audible range. These are sonic proximity sensors, FWIW. - Chris. (21 years ago, 21-Nov-03, to lugnet.robotics, FTX)
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