A A A A Search :
Toledo Talk  
From jr's workspace   

Jr:scratchpad

(musing about Lake Erie West and beyond)

Ultrasonic hearing and tests

http://en.wikipedia.org/wiki/Ultrasound

http://www.ultrasonic-ringtones.com/

http://www.freemosquitoringtones.org/

http://www.noiseaddicts.com/2009/03/can-you-hear-this-hearing-test/

http://www.nytimes.com/2006/06/12/technology/12ring.html?_r=1

http://www.metro.co.uk/weird/14031-pupils-perform-alarming-feat

created by jr on Jul 09, 2007 at 09:47:25 am
updated by jr on Feb 16, 2010 at 04:47:30 pm     Comments: 0

print      source      versions      backlinks