JP2006042186A - Speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein sound pressure of high frequency falls and the high frequency must be boosted by a circuit to compensate the fall of the high frequency while two speakers are arranged at an angle of 180 degrees in the case of obtaining a wide sound field. <P>SOLUTION: This speaker consists of a speaker unit for an L channel and an R channel whose oscillating axes are arranged to mutually become an angle of approximately 180 degrees and in which reproduction sound pressure of high frequency is higher than middle and low frequency and an enclosure which stores the speaker unit for the L channel and the R channel. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a speaker.

  The present applicant has so far studied how the sound emitted from a speaker propagates in space and reaches the listener's ear. In Japanese Patent Application No. 2002-375615, the present applicant has proposed a speaker in which speaker units for L and R channels are arranged with an oscillation angle of 180 degrees. According to this speaker, a wide sound field can be obtained without increasing the interval between the speaker units.

  However, since the speaker unit is disposed at an angle of 180 degrees with respect to the listener, the frequency characteristics of the high range generally decrease. To compensate for this, the high frequency was boosted on the circuit and played. However, the high-frequency boost on the circuit boosts the high-frequency noise together, so that the S / N ratio deteriorates.

  The vibration axes are arranged so as to be at an angle of about 180 degrees with each other, and the speaker unit for the L channel and the R channel whose reproduction sound pressure in the high range is higher than that in the middle and low range.

  According to the present invention, it is possible to obtain a wide sound field even though the distance between the speaker units is narrow, and it is not necessary to boost the high frequency by the circuit.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.

  Examples of the present invention will be described below. FIG. 1 is a front view of the speaker 1. The L-channel speaker unit 4 and the R-channel speaker unit 5 are provided back-to-back in the sealed enclosures 2 and 3, respectively. The vibration of the L-channel speaker unit 4 and the R-channel speaker unit 5 is provided. The axes are at an angle of 180 degrees to each other. Therefore, reproduced sounds from the speaker units 4 and 5 are radiated onto the space in opposite directions. Reference numeral 6 denotes a partition wall for separating the enclosures 2 and 3, and prevents mutual interference caused by reproduced sound from the speaker units 4 and 5.

  2 and 3 are a front view and a right side view showing a state in which the speaker 1 is installed on the upper part of the plasma display 10. The reproduced sound from the speaker 1 is released into the space at an angle of 180 degrees to spread the sound image in the left-right direction, and the same sound field space in which the speaker units 4 and 5 are set apart from the actual distance. Can be obtained.

  FIG. 4 shows the frequency characteristics of the speaker units 4 and 5. As shown by the line A in FIG. 4, the frequency characteristics on the vibration axis of the speaker units 4 and 5 increase from about 1 kHz, and the sound pressure increases from about 5 dB near 5 kHz and about 10 dB near 15 kHz. Yes. On the other hand, a line B in FIG. 4 shows frequency characteristics at a position of 90 degrees from the vibration axis of the speaker units 4 and 5. As shown by the line A in FIG. 4, since the high frequency band is originally raised and the frequency characteristic is slightly, even in a position where the sound pressure in the high frequency band is decreased, the frequency band is almost flat in all frequency bands as indicated by the line B. Characteristics can be obtained. Therefore, it is possible to propagate the reproduction sound without attenuation of the high frequency to the listener located at an angle of 90 degrees with the vibration axis of the speaker units 4 and 5 without boosting the high frequency by the electric circuit.

  In the above-described embodiment, the embodiment has been described with two stereo channels. However, this speaker may be used as a front channel speaker for a 5.1 channel surround signal. In this case, it is desirable to add a center speaker and direct its vibration axis toward the listener.

  In addition, the present invention is not limited to the above-described embodiments, and various modes can be taken without departing from the spirit of the present invention.

The front view of the speaker 1. FIG. The front view which shows the state which installed the speaker 1 in the upper part of the plasma display 10. FIG. The right view which shows the state which installed the speaker 1 in the upper part of the plasma display 10. FIG. The figure which shows the frequency characteristic of the speaker units 4 and 5. FIG.

Explanation of symbols

1 Speaker 2, 3 Enclosure 4, 5 Speaker unit 6 Bulkhead

Claims (2)

A speaker unit for the L channel and the R channel, which are arranged so that the vibration axes are at an angle of about 180 degrees with each other, and the reproduction sound pressure in the high range is higher than that in the middle and low range,
A speaker comprising an enclosure for storing the L channel and R channel speaker units.   The speaker according to claim 1, wherein the L channel and R channel speaker units are housed in independent enclosures.