New Transducers Limited

Johan Frank Van Der Linde

Henry Firouz Azima

Nicholas Patrick Roland Hill

Timothy Christopher Whitwell

Robin Christopher Cross

Audio apparatus () comprising a piezoelectric transducer () and coupling means () for coupling the transducer to a user's pinna () whereby the transducer excites vibration in the pinna () to cause it to transmit an acoustic signal from the transducer () to a user's inner ear, characterised in that the transducer is embedded in a casing () of relatively soft material and the casing () is mounted to a housing () of relatively hard material such that a cavity () is defined between the casing () and housing (). A method of designing audio apparatus comprising mechanically coupling a piezoelectric transducer to a user's pinna and driving the transducer so that the transducer excites vibration in the pinna to cause it to transmit an acoustic signal from the transducer to a user's inner ear, characterised by embedding the transducer in a casing of relatively soft material and by mounting the casing to protective housing of relatively hard material such that a cavity is defined between the casing and housing.

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Huntingdon, United Kingdom

Johan Frank Van Der Linde