초록 ▼

The present invention provides an electro-acoustic transducer including a pair of piezo-electric plastics film diaphragms coupled in a push-pull manner and so arranged as to form a lens-like configuration by a body of a light fibrous material therebetween. The diaphragms are coupled in push-pull man

The present invention provides an electro-acoustic transducer including a pair of piezo-electric plastics film diaphragms coupled in a push-pull manner and so arranged as to form a lens-like configuration by a body of a light fibrous material therebetween. The diaphragms are coupled in push-pull manner, and the transducer is especially suitable for use in a telephone instrument.

대표청구항 ▼

An electro-acoustic transducer comprising: a pair of piezo-electric plastic foil diaphragms having lenticular portions, each of said diaphragms including a plurality of spaced layers of said plastic foil; and a separate surface electrode disposed on each surface of each of said plurality of layers,

An electro-acoustic transducer comprising: a pair of piezo-electric plastic foil diaphragms having lenticular portions, each of said diaphragms including a plurality of spaced layers of said plastic foil; and a separate surface electrode disposed on each surface of each of said plurality of layers, each of said plurality of layers being electrically polarized such that the movement of said pair of diaphragms generates a potential difference between said surface electrodes of each of said plurality of layers and the application of an alternating voltage to said surface electrodes causes said pair of diaphragms to vibrate; and said surface electrodes are interconnected such that said pair of diaphragms operate in a push-pull manner.