New Transducers Limited

Martin Roberts

Henry Firouz Azima

Martin Colloms

Neil John Harris

Graham Bank

Bijan Djahansouzi

Edward Jarvis

Norman Crocker

A loudspeaker drive unit comprising a resonant acoustic radiator, an exciter on the radiator to apply bending wave energy to the radiator to cause it to resonate, a support for the loudspeaker drive unit, and means resiliently coupling the exciter to the support.

Loudspeakers

An electro-dynamic inertial vibration exciter ( ), for exciting a member ( ) having capability to sustain and propagate input vibrational energy comprising a motor coil assembly ( ) having a coil ( ) rigidly fixed to a tubular coil former member ( ), a magnet assembly ( ) disposed concentrically with respect to the motor coil assembly, and means ( ) suspending the magnet assembly for axial movement relative to the motor coil assembly, characterized by a carrier ( ) supporting the motor coil assembly ( ) and adapted for connection to the member ( ) to be excited.

Electro-dynamic exciter

A personal computing device, such as a lap-top computer, has a body with a keyboard, a lid with a display screen hinged to the body, a resonant panel loudspeaker carried by the lid and an acoustic waveguide on the lid to direct acoustic output from the loudspeaker. The waveguide comprises a member mounted on the lid, the member being movable on the lid from a retracted/closed position to an advanced/open position.

Personal computing devices comprising a resonant panel loudspeaker

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Suffolk, United Kingdom

Martin Roberts