Chrome no longer supports backwards compatibility for Webkit Web Audio API functions.
Balint Seeber
Signal identification guide
To help identify radio signals through example sounds and waterfall images
http://www.sigidwiki.com/wiki/Signal_Identification_Guide
Log periodic antennas
Printed circuit board antennas for UHF and above
By Kent Electronics
http://www.wa5vjb.com/products1.html
Wi-Spy DBx
Wifi analysis tools for 2.4 and 5 GHz networks.
by Passmark.
http://www.passmark.com/products/metageek-wi-spy-dbx.htm
Neural Nostalgia
Why do we love the music we heard as teenagers?
By Mark Joseph Stern at Slate
Videos from Defcon 22 Wireless Village talks
Software defined radio.
At irongeek.org
http://www.irongeek.com/i.php?page=videos/defcon-wireless-village-2014/mainlist
Noise Down – sound manager alarm app
A machine to tell humans when its too loud.
By Internetics Ltd.
https://itunes.apple.com/us/app/noise-down-sound-manager-alarm/id512411644?mt=8
ook-decoder
Ook-decoder reads On-Off Keying radio data commonly used in the 433MHz ISM bands using a software defined radio (SDR).
By Jim Studt
https://github.com/jimstudt/ook-decoder
A visual microphone
Passive Recovery of Sound from Video
By Abe Davis
Article by Alex Hern at the Guardian
http://www.theguardian.com/technology/2014/aug/05/mit-crisp-packet-eavesdrop-audio-sound