Transducer makes for easy listening

Article Abstract:

Topexpress Ltd. has developed a new technology which will permit the production of cheaper microphones and flat panel loudspeakers. The acoustic transducer technology uses a piezoelectric plastic PVDF sandwiched between a conductive layer at the front and a resistive layer at the back. These materials work together to give a very short time constant at the centre, where there is a high frequency response, and a large time constant at the edge, where there is a high frequency response. This action makes the transducer behave like both small and large units and eliminates the need to have both.

Usage, Innovations, Product introduction, Engineering services, Engineering firms, Loudspeakers, Microphones, Piezoelectric transducers, Topexpress Ltd.

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Drums roll lowest cost composites

Article Abstract:

New production techniques now mean that composites and fibre reinforced pre-pregs can be made at lower cost. A single layer of fibre wound onto a drum is cheaper to set up than continuous web techniques for making pre-pregs. Composites can be made by taking fibre-reinforced thermoplastic sheet and hot rolling it onto cellular reinforcement.

Thermosetting composites

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CAD specialists curry favour

Article Abstract:

The UK's Institution of Engineering Designers is recognising the trend towards mixed discipline teams and is actively targeting CAD specialists and similar engineering software experts to increase its membership.

Membership, Engineers, Institution of Engineering Designers (UK)

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