The BBC Recordings (The Sound album) The BBC Recordings (The Sound album) The BBC Recordings is a live album by English post-punk band the Sound, consisting of two sessions and two live recordings from 1980 to 1985 done for BBC radio. It was released in 2004 by Renascent. The first disc of "The BBC Recordings" consists of two recorded sessions, the first for Mike Read, which was originally broadcast between 6 and 9 October 1980, and the second for John Peel, broadcast on 16 November 1981. The second disc consists of concert recordings, the first broadcast on 21 November 1981 and the second broadcast on 15
Time reversal signal processing time reversal (using a negative time) of that solution is also a solution. This occurs because the standard wave equation only contains even order derivatives. Some media are not reciprocal (e.g. very lossy or noisy media), but many very useful ones are approximately so, including sound waves in water or air, ultrasonic waves in human bodies, and electromagnetic waves in free space. The medium must also be approximately linear. Time reversal techniques can be modeled as a matched filter. If a delta function is the original signal, then the received signal at the TRM is the impulse response of the