Public marks with search ultrasonic Public marks with search ultrasonic http://blogmarks.net/marks/search/ultrasonic Ultrasonic Ringtones - The new ringtones that only kids can hear! http://www.ultrasonic-ringtones.com/ Can I hear these ultrasonic ringtones? Find out just how far your ears can hear into the range of ultrasonic ringtones. Pretty much everyone should be able to hear the lowest tone (8kHz). Many people should be able to hear up to around 14.1kHz, from around 17kHz upwards we get into the range that only the under 20's can hear! 2006-12-19T11:03:30Z sharing8 声音, 年纪, 频率

Ultrasonic Ringtones - The new ringtones that only kids can hear!

by sharing8

Can I hear these ultrasonic ringtones? Find out just how far your ears can hear into the range of ultrasonic ringtones. Pretty much everyone should be able to hear the lowest tone (8kHz). Many people should be able to hear up to around 14.1kHz, from around 17kHz upwards we get into the range that only the under 20's can hear!

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]]> Ultrasonic Detector and Identifier of Land Mines http://www.nasatech.com/Briefs/Oct01/NPO20399.html 2006-03-15T14:25:54Z antonio.castellon imported ie favorites, personal e intransferible, cortacesped, demining !!!!!!!!!!!!!!!!!!!!!!!

Ultrasonic Detector and Identifier of Land Mines

by antonio.castellon

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]]> Ultrasonic Motion Sensing Animal Repeller http://www.smarthome.com/6143.html 2005-09-09T05:53:24Z mark509 shopping, personal

Ultrasonic Motion Sensing Animal Repeller

by mark509

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