Home | Links | Contact Us | More About Intellectual Property | Bookmark

Search patents:

Home

Audio Signal Processing

Speaker-system

Level control circuit for low and medium sound

It is an object of the present invention to provide a level control circuit for low and medium ...

Multi-signal processor synchronized system

We claim: 1. A multiprocessor system comprising: a plurality of signal processors each adapted to ...

Electroacoustic piezoelectric transducers

We claim: 1. An electroacoustic piezoelectric transducer including a mechanically stretched ...

Stereoscopic video display system

Accordingly, it is a general object of this invention to provide an improved stereoscopic video ...

Endoscope automatic light control apparatus and endoscope apparatus making use of the same

An object of the present invention is to provide an endoscope automatic light control apparatus ...

Lockable cover for push button telephones

What I claim as new and desire to secure by Letters Patent is: 1. A lockable cover device for push ...

Fragrance device

Accordingly, it is an object of this invention to provide an improved, battery operated fragrance ...

Earphone

The present invention provides an earphone including a speaker unit and a case in which the speaker ...

Piezoelectric polymeric film balloon speaker

Underwater acoustic transducers employing polymeric piezoelectric film materials are known. In B...

Piezoelectric saddle for musical instruments and method of making same

It is therefore an object of the present invention to provide for a novel and improved ...

Speaker system

Details

Inventors: Tanaka, Mitsuaki; Suzuki, Hidetsugu;
Assignee: Victor Company of Japan, Limited (Yokohama, JP)
Primary Examiner: Robinson; Thomas A.
Assistant Examiner:
Attorney, Agent or Firm: Lowe, King, Price & Becker

According to a first aspect of the invention, a diffraction compensation circuit is employed to relatively raise the level of an input electrical audio signal at low frequencies. A speaker is driven in response to the output signals of the diffraction compensation circuit, thereby offsetting a diffraction characteristic inherent in a speaker enclosure. According to a second aspect of the invention, the radiation surface of the vibrating member of a speaker is made flat. The speaker is installed in an enclosure in such a manner that the flat surface of the vibrating member is flush with the exterior surface of the enclosure, thereby reproducing an audio signal with high fidelity.

DETAILED DESCRIPTION The present invention has been developed in order to remove the above mentioned drawbacks inherent to the conventional speaker system.
It is, therefore, a primary object of the present invention to provide a speaker system in which reproduction of audio signals with high fidelity is performed.
Another object of the present invention is to provide such a speaker system in which the frequency to sound pressure level characteristic is flat over a wide range.
Another object of the present invention is to provide such a speaker system in which the dynamic range at low frequencies is widened.
A further object of the present invention is to provide such a speaker system in which the influence by the diffraction due to the speaker enclosure is compensated.
A still further object of the present invention is to provide such a speaker system in which phase difference between audio frequencies emitted from different points on the radiation surface of a vibrating member of a speaker is reduced.
An even further object of the present invention is to provide such a speaker system in which the radiation surfaces of a plurality of speakers of a multi-speaker system are aligned on the same plane.
p A still further object of the present invention is to provide such a speaker system in which respective sound waves emitted from more than two speakers of a multi-speaker system are matched in the phase thereof in the vicinity of the crossover frequencies.
In order to achieve the above described objects of the present invention, two major improvements are proposed by the inventors of the present invention, and these improvements will be referred to as first and second aspects of the present invention hereinbelow throughout the specification.
According to the first aspect of the present invention, a diffraction compensation circuit is provided to compensate for the diffraction characteristic inherent to an enclosure of a speaker.
The diffraction compensation circuit raises or lowers the level of an electrical audio signal in a predetermined frequency range by a predetermined amount so as to drive a speaker or speakers by a modified audio signal

Related patents

	Speaker distortion compensator Methods and systems in accordance with the invention nullify or substantially eliminate the effects of spurious emanations from simple source transducers that are ...
	Resistively damped loudspeaker system In accordance with the invention, provision is made for electrical damping of the coils, capacitors and loudspeaker drive units of loudspeaker systems and more ...
	Audio system with amplifier and signal device The present invention provides a sound system which is particularly adapted for use with such an unperforated movie screen. The system includes a bass speaker unit and a ...
	Correction circuit and method for improving the transient behavior of a two-way loudspeaker system OF THE ILLUSTRATED EMBODIMENT Described herein are the transducers, correction circuits, a crossover circuit and cabinet geometry for a multi-way loudspeaker system; ...
	Loudspeaker system These and additional objects are accomplished by improvements in a loudspeaker system employing transmission-line concepts. According to one aspect of the invention, the ...
	Correction circuit and method for improving the transient behavior of a two-way loudspeaker system OF THE ILLUSTRATED EMBODIMENT Described herein are the transducers, correction circuits, a crossover circuit and cabinet geometry for a multi-way loudspeaker system; ...
	Hanging, positionable, speaker enclosure OF THE INVENTION The above described drawing figure illustrates the invention, an enclosed audio device for cooperative mounting to a ceiling structure 10 in a ...
	Digital duplex transmission system We claim: 1. A digital duplex transmission system comprising: two terminals interconnected by a 2-wire transmission line; first means disposed in one of said terminals ...
	Extended response dynamic noise reduction system The block diagram of the preferred dynamic noise reduction system is illustrated in FIG. 1. The system includes an input buffer 10 through which the input signal E.sub.I...
	Distortion-cancellation circuit for audio peak limiting I claim: 1. In an audio peak limiting apparatus, an improvement for reducing distortion comprising: a clipper coupled to receive an input audio signal; a differencing ...

0.034
Archive: All patents - Links Copyright (c)2006 Eipa-patents.org - All rights reserved