Crossover system

• US 5,533,135 A
• Filed: 04/10/1995
• Issued: 07/02/1996
• Est. Priority Date: 04/10/1995
• Status: Expired due to Fees

• Current Assignee: Phillip A. Gary
• Original Assignee: Phillip A. Gary
• Inventors: Gary, Phillip A.
• Primary Examiner(s): Isen, Forester W.
• Assistant Examiner(s): NGUYEN, DUC MINH
• Application Number:
  US08/419,189
• Time in Patent Office: 449 Days
• Field of Search: 381/99, 381/100, 381/89
• US Class Current: 381/99
• CPC Class Codes: H04R 3/14 Cross-over networks

Abstract

An audio crossover system having two crossover networks, one suited to the auditory preferences of women and the other to the auditory preferences of men. The former attenuates mid-range frequencies more than high-range frequencies and attenuates low-range frequencies still more. The latter attenuates mid-range frequencies more than low-range frequencies and attentuates high-range frequencies even more than those in the mid-range.

Claims

1. A speaker system to be connected to a source of audio signals to produce audible sounds from the signals, the system comprising:

(a) a first set of loudspeakers comprising first, second and third speakers (23, 24,

     25);

(b) a first crossover network connected to the first set of speakers and comprising;

(i) means (20) to transmit to the first speaker audio signals in a first range of audio frequencies below a first frequency to produce sound pressure at a first selected low level,

(ii) means (21) to transmit to the second speaker audio signals in a second range of audio frequencies above the first frequency and below a second frequency to produce sound pressure at a second selected intermediate level higher than the first selected sound pressure level, and

(iii) means (22) to transmit to the third speaker audio signals in a third range of audio frequencies above the second frequency to produce sound pressure at a third selected level higher than the second selected sound pressure level;

(c) a second set of loudspeakers comprising fourth, fifth, and sixth speakers (26, 27,

     28); and

(d) a second crossover network connected to the second set of speakers and comprising;

(i) means (26) to transmit to the fourth speaker audio signals in the first range of audio frequencies to produce sound pressure at substantially the third selected level,

(ii) means (27) to transmit to the fifth speaker audio signals in the second range of audio frequencies to produce sound pressure at substantially the second selected level, and

(iii) means (28) to transmit to the sixth speaker audio signals in the third range of audio frequencies to produce sound pressure at substantially the first selected level.

2. The speaker system of claim 1, wherein the difference between the first and second sound pressure levels is approximately five decibels, and the difference between the second and third sound pressure levels is approximately five decibels.

3. The speaker system of claim 1, wherein the first and second sets of speakers are connected in parallel to the audio signal source;

said speaker system further comprising first switch means (15) for selectively disconnecting said first set of speakers from the audio signal source, and a second switch means (16) for selectively disconnecting said second set of speakers from the audio signal source.

4. A speaker system to be connected to a source of audio signals to produce audible sounds from the signals, the system comprising:

(a) a first set of loudspeakers comprising first and second speakers;

(b) a first crossover network connected to the first set of speakers and comprising;

(i) means to transmit audio signals in a first range of audio frequencies below a first frequency to the first speaker to produce sound pressure at approximately a first level, and

(ii) means to transmit audio signals in a second range of audio frequencies above the first frequency to the second speaker to produce sound pressure at approximately a second level, the second level being higher than the first level by a predetermined amount;

(c) a second set of loudspeakers comprising third and fourth speakers; and

(d) a second crossover network connected to the second set of speakers and comprising;

(i) means to transmit audio signals in the first range of audio frequencies to the third speaker to produce sound pressure at approximately the second level, and

(ii) means to transmit audio signals in the second range of audio frequencies above the first frequency to the fourth speaker to produce sound pressure at approximately the first level.

5. The speaker system of claim 4, wherein the difference between the first and second sound pressure levels is approximately five decibels.

6. The speaker system of claim 4, wherein the first and second sets of speakers are connected in parallel to the audio signal source;

said speaker system further comprising first switch means (15) for selectively disconnecting said first set of speakers from the audio signal source, and a second switch means (16) for selectively disconnecting said second set of speakers from the audio signal source.