Audio Island

Dr. Joan Bushwell's Chimpanzee Refuge

Category archives for Audio Island

Acoustics 101

There’s a nice series of articles on acoustics and pyschoacoustics over at Audio Design Line. Part One, for example, looks at pressure waves, propagation velocity, frequency, wavelength, and related items. The sequence is a nice overview if you’re interested in the mechanics of music and audio but have no formal training in the subject.

Audio Design Line Top Ten

Audio Design Line has a handy new link for its top ten articles of 2007. Lots of good stuff here including the loudspeakers & cables series referrenced a couple months ago, class D amplifier design, and audio data compression (you know, that MP3 stuff and the like). Fun reading for a frigid Friday (or Thursday).

Audio Island & Pattern Juggling

I have added two new categories to the refuge, Audio Island and Pattern Juggling, for the convenience of those interested in a couple of my “off the beaten path” jaunts. I have gone back and retagged a bunch of old posts and will use these tags in the future. Audio Island is basically a catch-all…

DIY Lab Gear: Vibrating String Apparatus

Sometimes I can’t seem to find just the right lab equipment I want for a particular experiment so I design it myself. Such was the case recently for a course I developed and teach entitled Science of Sound. This course is a natural science elective and deals with the physics of audio and acoustics. We…

Esoteric Audio Cables

A previous post featured a short film about members of the Audiophile Club of Athens and the rather extreme sound systems their members have created. Some members spent in excess of $300,000 to build their systems. You may be wondering just what manner of gear that sort of money would buy, and would it really…

Audio Obsession

Regular readers of the refuge know that I’ve got a “thing” for audio and music, and that I’ve had some harsh comments regarding the poor quality audio that so many people tolerate these days in the name of convenience. But what of the other extreme? Who are the audiophile extremists? To what lengths will they…

Super Low THD+N

On the audio front, National Semiconductor, long a player in analog semiconductors, has announced a couple new op amp families producing a total harmonic distortion plus noise spec of 0.00003%. These devices are aimed squarely at higher end audio applications and also offer a very low voltage noise spec of 2.7 nanovolts per root-Hertz with…

Apple iPhone Guts

Curious about what’s inside an iPhone? Well, the good folks at Audio Design Line (via EE Times) have a teardown. Mind you, it’s not like the old days when you could just pop off the cover of your new electronic doohickey and look at the manufacturer’s part numbers on the chips. These are the days…

Bypass Capacitors

Shifting gears from the usual ranting at the Refuge, I came across a nice series of articles from Audio Design Line on the usage and selection of bypass capacitors in electronic circuits. This is a topic with which my students often seem to have difficulty. There is a nice tutorial on the modeling and behavior…

The Sound (and Cost) of Worship

Audio is where I spend much of my time, both professionally and as a hobby. In fact, quite a few years ago I used to design public address systems and components (most notably loudspeaker systems and subwoofers). That venture didn’t last too long because I discovered that many people just didn’t care that much about…