HEATKEYS

The leading professional association worldwide for professionals and students involved in the audio industry. The AES serves its members, the industry and the public by stimulating and facilitating advances in the constantly changing field of audio. ...

ESP - The Audio Pages. Professional results for the DIY enthusiast. Audio articles, projects to build and general information about hi-fi amplifiers, loudspeakers and audio in general.

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

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.

Free Electronic projects, schematics, diagramms, pcb, free electronic software and hobbilist electronics resources, electronic community and much more

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...

Free books and documents search with fast and relevant results better than any online library.

Advanced Test Equipment Rentals offers rentals, sales and service of Test and Measurement Equipment as well as many other types of equipment used in research, development and technology.

Complete Patent Searching Database and Patent Data Analytics Services.