Oliver Lodge
Physicist and moving-coil transducer pioneer
Major contribution
Lodge developed an early moving-coil loudspeaker arrangement and explicitly proposed distributing a speaker’s voice around a large hall.
Lodge’s 1898 British patent described a moving-coil transducer and telephone-related amplification arrangements. His design used nonmagnetic spacers in the magnetic air gap, one of the practical details in the evolution of moving-coil loudspeakers.
The patent proposed magnifying a voice and distributing it to different parts of a large hall, making its connection to sound reinforcement unusually explicit. Earlier moving-coil proposals existed, so Lodge is better understood as an important contributor than as the uncontested sole inventor of the dynamic loudspeaker.
Key work
- British patent 9712 (1898)
- Moving-coil loudspeaker with nonmagnetic air-gap spacers (1898)
- Large-hall voice-distribution proposal in patent 9712 (1898)
In the chronology
Selected sources
- A brief history of electroacoustics, pt. 4: Early moving coil loudspeakers · Acoustics Research Centre
- 1898, Oliver Lodge: elektrodynamischer, trichterloser Lautsprecher · Medienstimmen