HEATKEYS

Tests your audio equipment, speakers, room acoustics and hearing. Audio signals and test tones playable online. High resolution sound test files available for free download.

A High-Quality Web-based Audio Frequency Signal Generator. 96kHz Sample Rate. Generate sine waves, sweep tones, noises and other sound test waveforms, online!

DAQARTA (Data AcQuisition And Real-Time Analysis) software turns your Windows sound card into a full-featured big-screen oscilloscope, FFT spectrum analyzer (with color spectrograms), signal averager, frequency counter, voltmeter, and sound level met...

YouTube is a place to discover, watch, upload and share videos.

Instructables is the Biggest How To and DIY community where people make and share inspiring, entertaining, and useful projects, recipes, and hacks.

DX Zone directory with 15000 Amateur Radio links, about Ham-Radio radio scanning, cb radio and shortwave listening, antenna homebrew projects and a complete radio software collection. Include a free classified ads, ham radio reviews and operators di...

AudioNotch.com creates Tailor-Made Notched Sound Therapy for the treatment of Tinnitus, and is based on brand-new scientific research.

A site for people who think. Intellectual resources, programming, astronomy, science, mathematics, Java applets, HTML instruction, home of Arachnophilia.

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Electronic Design, a web site and print magazine for electronic design engineers and engineering management.

EDN: Information, News, & Business Strategy for Electronics Design EngineersEDN.com is a comprehensive information source for the EOEM (electronics original equipment manufacturer) segment, providing in-depth technical information for electronics...

Sound Card Signal Generator, free download. Sound Card Signal Generator 3.2: Sound Card Signal Generator is a powerful PC based virtual instrument.....