TDK originally had no intention to develop new speakers. The firm was developing vibration-damping materials that could be use in the internal walls of helicopters. In order to try and make helicopter rides a little quieter, TDK was developing soundproofing materials capable of absorbing vibrations that occur in the internal walls of helicopter cabins.
The company came up with a material with exactly the opposite properties to those required in helicopters. A TDK spokesman said: "Development work on non-vibrating materials was being carried out, but the result was a new material with excellent properties in terms of resonance. So we looked around for a suitable application and decided on audio speakers."
Caption: The SP-NX701 speakers will go on sale in October. The speakers are made using material originally intended for use in soundproofing helicopters.