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A brief history of electroacoustics, pt. 1:The birth of electroacoustics and...
Bjørn Kolbrek, Acoustics Research Centre: While electroacoustics is as old as lightning and thunder, man’s controlled application of it dates back to the 18th century. Early electroacoustic phenomena...
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A brief history of electroacoustics, pt. 2: The telephone
Bjørn Kolbrek, Acoustics Research Centre: Two inventors with significantly improved, successful telephone devices made it to the patent office on the same day, February 14, 1876. These two inventors...
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A brief history of electroacoustics, pt. 3: Microphones
Bjørn Kolbrek, Acoustics Research Centre: In the preceding parts, I have mentioned several microphone (transmitters, in telephone lingo) types that were used in early telephone experiments. The first...
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A brief history of electroacoustics, pt. 4: Early moving coil loudspeakers
Bjørn Kolbrek, Acoustics Research Centre: The moving coil loudspeaker is without doubt the most common electroacoustic transducer in use. It consists of a circular coil suspended to move freely in a...
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A brief history of electroacoustics, pt. 5: Moving coil loudspeakers of...
Bjørn Kolbrek, Acoustics Research Centre: In Part 4, we looked at various early variants of moving coil (or moving conductor) loudspeakers, including predecessors of the modern moving coil cone driver....
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A brief history of electroacoustics, pt. 6: Various loudspeaker mechanisms
Bjørn Kolbrek, Acoustics Research Centre: The invention of the telephone set off a wave of creativity, and almost all conceivable transducer mechanisms were tried out in the 1870s and 80s. Some of them...
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A brief history of electroacoustics, pt. 7: Loudspeaker enclosures
Bjørn Kolbrek, Acoustics Research Centre: Reis’ telephone was perhaps the first loudspeaker of any kind, as it employed a magnetostriction driver mounted in a resonating box. But it would still take...
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A brief history of electroacoustics, pt. 8: Horns: Early development
Bjørn Kolbrek, Acoustics Research Centre: It is hard to tell when horns first were used. They have been in use for thousands of years as instruments, and man must early have discovered the amplifying...
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A brief history of electroacoustics, pt. 9: Horns: Cinema sound and large...
Bjørn Kolbrek, Acoustics Research Centre: The 1920s saw much development in horn loudspeakers, and loudspeaker in general. Western Electric already had their microphones, amplifiers, straight...
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