ive got a small problem... that "teenager" repellant device has been made into a ring tone and now its spread throughout my city, its on buses and in librarys and all embeded in the hands of grubby teenagers who foolishly believe they are the only ones who can hear it as supposedly anyone over 20 cant... well im 24 and its driving me nutts .
so im curious, what frequency can can you all hear
http://www.ultrasonic-ringtones.com/
14.1kHz to 15.8 is the average.
so im curious, what frequency can can you all hear
http://www.ultrasonic-ringtones.com/
14.1kHz to 15.8 is the average.