11. There was no audible sound once the aircraft had passed over. 12. The ultrasonic devices achieve high directivity by modulating audible sound onto high frequency ultrasound. 13. A frequency over 30 Hz will produce an audible sound . 14. Whistling kettles emit an audible sound as the water boils. 15. Some implementations even included audible sounds interspersed with the data. 16. It can be associated with presence of audible sound when clenching or grinding the teeth. 17. Note that the wavelengths in audible sound are much longer than those in visible light. 18. Interaction with the surrounding air causes audible sound waves, which travel away from the instrument. 19. Signals are analysed by a software fast Fourier transform algorithm and converted into audible sound . 20. It's the Audible sound of a great idea coming.
