First-order loudspeaker crossover network

A crossover network, speaker technology, applied in the direction of speaker distribution signals, etc., can solve the problems of expensive size, capacity and power requirements, and increase the cost of speaker system.

Inactive Publication Date: 2007-02-14
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These additional components add significantly to the cost of the loudspeaker system since the capacitors and inductors used in the crossover network are usually expensive due to size, capacity and power requirements

Method used

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  • First-order loudspeaker crossover network
  • First-order loudspeaker crossover network
  • First-order loudspeaker crossover network

Examples

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Embodiment Construction

[0020] figure 1 A two-way loudspeaker system 100 using a first order crossover network 105 in accordance with the principles of the present invention is shown. Two-way speaker system 100 included in figure 1 Tweeter 110 represented by a resistor in , and in figure 1 The woofer 150 is also represented by a resistor. Each of tweeter 110 and woofer 150 has a positive terminal (at figure 1 Indicated by +), and the negative terminal (with figure 1 opposite to the terminal marked "+" in the The audio signal input to the crossover network 105 can be amplified by the amplifier 170 . Crossover network 105 includes a capacitor 120 coupled in series with tweeter 110 to form a high pass filter for providing a high-band input signal to tweeter 110; and an inductor 160 coupled in series with woofer 150 to form a high-pass filter. A low pass filter is formed for providing a low frequency band input signal to the woofer 150 . Inductor 160 is coupled to woofer 150 with a first polarity ...

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Abstract

A first-order crossover network having low-pass and high-pass filters to respectively drive first and second loudspeakers in a loudspeaker system is designed such that the phase difference at a crossover frequency between output signals of the first and second loudspeakers is no greater than 60 degrees, so that the output signals are at least partially in phase. Preferably, the phase difference should be about 40 degrees to create a near in-phase effect. The polarity in which the first loudspeaker is coupled to the first-order crossover network is an inverse of the polarity in which the second loudspeaker is coupled to the crossover network. Optionally, the input signals can be equalized to flatten the magnitude responses of the crossover network.

Description

technical field [0001] The present invention relates to the field of loudspeaker frequency division network, more particularly, relates to a first-order loudspeaker frequency division network with some advantages of the second-order loudspeaker frequency division network. Background technique [0002] Crossover networks are used in multi-way loudspeaker systems to split the input audio signal into frequency bands, each of which feeds a different loudspeaker best suited for the frequency band in question. The frequency that separates one frequency band from another is called the border frequency of the two frequency bands. For example, in the two-way speaker system discussed below, the low and high frequency bands are fed to the woofer and tweeter, respectively, and the cutoff frequency is the frequency that separates the low and high frequency bands. [0003] In a first-order crossover network, such as a first-order Butterworth network, a capacitor is coupled in series with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/14
CPCH04R3/14
Inventor 马克·弗朗西斯·鲁姆里奇
Owner THOMSON LICENSING SA
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