CN2249475Y

CN2249475Y - Double-way reserved phase voice box

Info

Publication number: CN2249475Y
Application number: CN 95241949
Authority: CN
Inventors: 陈东红
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-07-31
Filing date: 1995-07-31
Publication date: 1997-03-12
Anticipated expiration: 2005-07-31

Abstract

The utility model discloses a double-way reserved phase sound box which is composed of a box body and loudspeakers, wherein, the front surface of the box body is provided with two rows of middle and high sound loudspeakers which are arrayed, and the middle high sound loudspeakers are arranged at the front of middle and low sound acoustic boxes. A low frequency resonance front cavity is arranged between the middle and low sound acoustic boxes. A resonance tongue cavity and the low sound acoustic box at the back of the box body form a passage which is like the Chinese character 'ao'. Two rows of low sound loudspeakers are oppositely arrayed in the resonance front cavity. The loudspeaker is arranged in a resonance back cavity. The middle and low sound acoustic boxes and both sides of the resonance back cavity are provided with reserved phase pipes. The double-way reserved phase sound box of the utility model has the advantages of high low frequency sound quality level, power saving, small volume of the box body, and convenient transportation and place. The natural frequency division without the frequency division of an LC circuit is realized.

Description

Two-way phase inverted cabinet

The utility model relates to a kind of sound appliances, especially audio amplifier.

Existing to swing to the most basses of formula audio amplifier are externals, be built-in even if minority is arranged, but its bass non-be array.This class phase inverted cabinet often adopts the heavy caliber loud speaker when satisfying high-power, highly sensitive condition, because the oscillating mass of heavy caliber loud speaker is heavy, the ring girth is long, and power amplifier seems comparatively difficult to the control of its starting of oscillation failure of oscillation.Since the influence of vibration type piston coherence, the loud speaker that bore is big more, and its transient state is just poor more, influences the response speed and the tonequality of low frequency therefrom.And aspect the raising sensitivity bigger limitation is being arranged.

The purpose of this utility model provides a kind of phase inverted cabinet of new structure form.It is high more that this audio amplifier makes full use of the many more sensitivity of loud speaker, more little its transient state reflection of loud speaker bore is good more, and low frequency diffraction, the Principles of Acoustics such as acoustic reflection of medium-high frequency refraction further develop the acoustic construction principle of phase inverted cabinet in utilization, improve the low frequency transient state thereby reach, improve the low-frequency sensitive degree, omit the lc circuit frequency division to save power, dwindle tank-volumes, in the hope of the purpose of even more ideal audio.

The purpose of this utility model is achieved in that it is made of casing and loud speaker, and acoustic box, resonant cavity and phase-reversing tube are arranged in the casing, and loud speaker comprises woofer and medium and high pitch loudspeaker.Medium and high pitch loudspeaker divides two row's arrays in the casing front, before being installed in the bass acoustic box, between middle bass acoustic box, establish the low-frequency resonant ante-chamber, the resonance ante-chamber is a rectangular cavities, place the resonance back cavity, the resonance back cavity is divided into the paraphase sound chamber of two different directions of symmetry, " recessed " shape passage of bass acoustic box formation at resonance back cavity and casing rear portion, subtend array two row's woofers in the resonance ante-chamber, loud speaker is installed in the resonance back cavity.Middle bass acoustic box and resonance back cavity both sides are phase-reversing tube.

Below in conjunction with drawings and Examples, structure of the present utility model is further described in detail.

Fig. 1 is the utility model outside drawing;

Fig. 2 is the utility model internal structure schematic diagram;

Fig. 3 is the utility model vertical view.

As shown in the figure, the utility model is made of casing and loud speaker, and acoustic box, resonant cavity and phase-reversing tube are arranged in the casing, and loud speaker comprises woofer and medium and high pitch loudspeaker.5 minutes two rows of medium and high pitch loudspeaker array is in the casing front, before being installed in bass acoustic box 3, between middle bass acoustic box 3, establish low-frequency resonant ante-chamber 4, resonance ante-chamber 4 is a rectangular cavities, place resonance back cavity 2, the paraphase sound chamber that resonance back cavity 2 is divided into two different directions of symmetry, resonance back cavity 2 constitutes " recessed " shape passage with the bass acoustic box 1 at casing rear portion, subtend array two row's woofers 6 in the resonance ante-chamber 4, loud speaker 6 is installed in the resonance back cavity 2, and the effect of resonance ante-chamber 4 is the forward direction acoustic energy of the built-in woofer of radiation subtend.In bass acoustic box 3 and resonance back cavity 2 both sides be phase-reversing tube 7, in order to from the different built-in woofers of both direction radiation acoustic energy and will send casing behind its resonance dorsad.

The utility model and traditional phase inverted cabinet relatively have following major advantage:

1, the utility model is because woofer and medium and high pitch loudspeaker all adopt many battle arrays The row mounting means, more traditional phase inverted cabinet, the raising of this low-frequency sensitive degree has bigger Elasticity.

2, the utility model can adopt small-bore raising one's voice owing to adopt many loudspeaker arrays Device, thus oscillating mass alleviated, and then can greatly dwindle tank-volumes, to transporting and putting Put, and make more convenient.

3, the utility model adopts many loud speakers, can meet or exceed the power of traditional high-power phase inverted cabinet, and owing to alleviating of oscillating mass, it seems more superior for power amplifier with regard to the control of the starting of oscillation of loudspeaker movements and failure of oscillation, thereby its transient state is better, thereby has improved the low frequency tonequality level of whole system.

4, traditional audio amplifier (comprise and swing to the formula audio amplifier) is the level of assurance tonequality and the balance distribution of high and low volume sense, the general terminal frequency divider that lc circuit all is installed in casing, and the terminal frequency divider of lc circuit will consume certain power, when especially the low frequency part-frequency point is low, a large amount of power consumptions are disadvantageous for the lower loud speaker of sensitivity on coil like this.The utility model is owing to adopted the built-in mode of woofer subtend array, middle and high sound sound wave is cancelled out each other in the straight line refraction, thereby realized the natural frequency division (being the acoustics frequency division) of no lc circuit frequency division, not only saved power, and guaranteed to expand the level of playback matter, like this, in audio amplifier design, the selection of woofer widened and to have utilized scope.

Claims

1, a kind of two-way phase inverted cabinet, constitute by casing and loud speaker, acoustic box is arranged in the casing, resonant cavity and phase-reversing tube, loud speaker comprises woofer and medium and high pitch loudspeaker, it is characterized in that medium and high pitch loudspeaker (5) divides two row's arrays in the casing front, bass acoustic box (3) is preceding in being installed in, between middle bass acoustic box (3), establish low-frequency resonant ante-chamber (4), resonance ante-chamber (4) is a rectangular cavities, place resonance back cavity (2), the paraphase sound chamber that resonance back cavity (2) is divided into two different directions of symmetry, resonance back cavity (2) constitutes " recessed " shape passage with the bass acoustic box (1) at casing rear portion, the interior subtend array two row's woofers (6) of resonance ante-chamber (4), loud speaker (6) is installed in the resonance back cavity (2), and middle bass acoustic box (3) and resonance back cavity (2) both sides are phase-reversing tube (7).