CN2812459Y - Omnidirectional radiation symmetric-drive digital cinema sound box - Google Patents

Abstract

The utility model discloses an omnidirectional radiation symmetric-drive digital cinema sound box which is composed of two columnar hollow box bodies, two curved helmet shells, curved cones and a supporting column, wherein medium-frequency and low-frequency drivers are arranged in the two columnar hollow box bodies and respectively arranged at an upper end and a lower end, and every two drivers are opposite to each other. The two opposite curved helmet shells are arranged at the middle part of the two columnar hollow box bodies, the high-frequency drivers are arranged in the curved helmet shells, the curved cones are arranged between the curved helmet shells, and the two curved helmet shells, the curved cones and the two columnar hollow box bodies are connected as a whole by the supporting column. The utility model solves the problem that a traditional sound box has the disadvantages of strict requirement on placing positions and narrow radial axial direction and guides the flow of a high-frequency sound wave from the middle part of radiator and a low-frequency sound wave from the upper and the lower parts of the radiator via three conical structures by structural characteristics, the sound waves are combined at the middle part of the radiator and radiated toward circumference in a way of 360 DEG, and sound is natural and fluent without oppressing sense as in a music hall.

Description

Send type radiation symmetry to drive the digital camera audio amplifier

Technical field

The utility model relate to a kind of with vibration of element the apparatus of sounding, especially a kind ofly cooperate, with the audio amplifier of 360 ° of comprehensive radiation of direction by two groups of relative high pitchs middle bass relative with two groups.

Background technology

The audition mode of earliest period is monophony (mono), and it has only one group of phonation unit (audio amplifier), so we can't be referred to as it the system of an audition, can only hear the size of acoustic tones height and volume in this manner.Produced stereo (stereo) standard afterwards, the generation of this standard is because change has taken place record type, this record type of stereo pickup promptly occurred.Though just when recording, increased a pickup transmitter, when playback, increased by one group of phonation unit, revolutionary variation has taken place for the audition impression that the auditor obtained.People have not only heard the variation of wave volume height size when audition, also the necessary being and the variation of acoustic image have been felt in comprehension, people can hear that a sound is not to merely hit from any one of two audio amplifiers to send, but a certain illusory point between them sends, so the notion of sound field produces thus.Scientific research shows why can produce the so illusory thing of sound field in human brain, be relevant with the audition mode with the arrangement of people's ear.People's ear can be told the small time difference that a sound source arrives two ears, and this may be acoustic image was taken one's bearings and produced to people's ear in human brain a reason.

Stereo sound field can reproduce natural sound field really, though this is the sound field move left and right of true reappearance acoustic image (can) of a two dimension, allows people can realize unprecedented sense of reality also.This is a kind of extremely successful form from the pickup to the playback, prolongs always and has used decades.Experienced the digitlization of audio mixing manufacturing process therebetween again, sound picks up-and the process of audio mixing making-sound-reducing becomes and becomes increasingly complex, the benefit of bringing is that the fidelity and the quality of sound is more and more higher, even to the stage that reaches the peak of perfection, people's ear also can't be told minute differences (distortion) therebetween.Yet ironically, no matter how this process changes, and the variation of essence does not but take place on this link of sound-reducing (audio amplifier).

The loudspeaker unit of selling on the current market all have radial axis to, traditional audio amplifier all is to a surface radiation, certain horizontal radiation angle is arranged, the medium-high frequency part is especially obvious, when people's the sense of hearing departs from the perpendicular bisector of two sound lines, its acoustic pressure and phase characteristic incite somebody to action all that great changes will take place, and in fact this be totally unfavorable for audition.In actual life, when hearing a sound source sounding, most of sound wave that people's ear is heard is reflected back by spatial obstacle thing etc., and direct sound wave is actual and few, and such sound sounds it being that nature is plentiful.Do not have reflected sound if having only direct sound wave, the sound of hearing is exactly wizened, and this experience will be more deep in strong anechoic room.On the practical work in actual life various sound sources also be to all the winds to spread sound wave, as long as you painstakingly do not go to change, they will reflect everywhere by its rule and spread apart.And according to the sound-reducing mode of present traditional audio amplifier, this strong radiation directivity must lose a lot of reflected sound information, and the sound field of reduction is nature.Simultaneously, traditional audio amplifier also has higher requirement to acoustic surrounding, because this strong radiation directivity often causes the local reflex excess enthalpy strong, and must take certain sound absorption measure, waste the energy of power amplifier and audio amplifier, the sound stiff lackluster that will seem.In addition, traditional audio amplifier is limited by the boundling effect, and best listening zone is very narrow, leaves best listening zone, and just great changes have taken place in the audition impression.If but enable voice 360 degree diffusions, above-mentioned situation will be improved greatly, it does not need sound absorption too many in the space, do not need extra sound diffusion facility yet, its acoustic energy just can to around average diffusion open, horizontal direction does not have directive property and directivity, acoustic surrounding has just become an acoustic resonator, sound is elegant naturally, does not have constriction, just like the same at music hall.

Along with technical development, the audiovisual media of a new generation is come out one after another, from HDCD, SACD, DVD to the HDVD that just releases recently, blu-ray system, EVD etc., these novel audio-visual medias all possessing without exception high-fidelity, big dynamically, the channel configuration of multitrack surround sound, people have also proposed the requirement of upgrading to audiovisual system.The video fan-out capability of the high definition of relative these medium, now there have been the liquid crystal of large-screen, high definition or plasm TV suitable, and there is the producer that rich technology and financial strength are more and more arranged to put in the middle of the contention in this large high-definition screen curtain panel TV market, certainly will promote the technological progress of this series products more, the trend of the more cheap market development that must become of lighter bigger thinner, more clear while price.

As the Digital Theater System that marches toward the brand-new epoch, no matter place the cinema system of family or the digital cinema system of specialty, people wish that best listening location tries one's best broadness a bit, even if deviation is arranged slightly, also be unlikely to acoustic image and obviously concentrate on a certain part, make the sound field serious disproportion.For specialized digital cinema system, service object is public, in the digital cinema that a up to a hundred people takes a seat, if allow digital rings that spectators on the scene can both enjoy true to nature and shock around audio frequency effect, this digital cinema of can not saying so demand urgently need solving problem.

Summary of the invention

The purpose of this utility model is that the above-mentioned technical background of foundation is a kind of " sending (π) type radiation symmetry to drive the digital camera audio amplifier " that prerequisite is developed.So-called send the type radiation to be meant that the angle of radiation of its sound wave is 360 degree, it is in order to increase the radiant power of audio amplifier that symmetry drives, and makes it can satisfy the application of various professional digital cinemas fully and reaches desirable acoustics.

The purpose of this utility model can realize by following measure:

A kind of type radiation symmetry of sending drives the digital camera audio amplifier, is to be made of two cylindrical cavity casings, two curve helmet shells, curve cone, pillar, in the two cylindrical cavity casings medium and low frequency driver is housed, and separation is two ends up and down, and is relative in twos; Be equipped with two relative curve helmet shells in the middle of it, in the curve helmet shell high frequency driver be housed, the curve cone places between the curve helmet shell, respectively curve cone, curve helmet shell and two cylindrical cavity casings is connected as a single entity by pillar.

The beneficial effect of advantage of the present utility model and generation is:

From overall structure, audio amplifier of the present utility model is a column type.Critical component is the curve helmet shell and the curve cone radiator of one group of 360 degree in the middle of it, has constituted the middle bass and the Horn of one 360 degree radiation.Because bass drivers is identical in the two high pitch drivers and two, and is also identical to (through the high frequency and the medium and low frequency of frequency division) drive signal that they apply respectively.Since used two groups of identical high pitchs and in bass drivers, and respectively relative in twos, with fully different on the general loudspeaker box structure, so-called symmetrical expression driving that Here it is.The result who does like this makes the power output of audio amplifier increase by one times (maximum output sound pressure level can increase 3db), just can realize that with very little sound box bodies height bears, big dynamic, big acoustic pressure output.

The utility model is to finish this complex process with cone.They are respectively by two groups of identical cylindrical cavity casings, and curve helmet shell (inside is equipped with high frequency driver respectively) and entity curve cone totally three sets of curves cone structures constitute.All drivers all are facing each other, and promptly the medium and low frequency driver is relative in twos, and high frequency driver is relative in twos, form symmetrical expression and drive.By curve helmet shell and curve cone, constituted the middle bass and the Horn of one 360 degree radiation.Because two high pitch drivers are identical, also identical to the drive signal that they apply, like this, the sound wave of the same constant power that sends by two voice units, same frequency content and phase characteristic will be respectively along by the inner housing of curve helmet shell and the formed enclosure space of curve cone to around radiation, and be fused into the high frequency radiation sound waves of a branch of 360 degree together to external radiation in the cone outer rim of curve cone.Because two high frequency drivers are identical, driving power and phase place are also identical, and high frequency radiation power is doubled.

For cylindrical cavity casing medium and low frequency loudspeaker unit (driver), their radiative acoustic wave passes through the rectification and the reflex of the shell body of curve helmet shell respectively, merges with the high frequency radiation sound wave at the casing middle part, uniformly to radiation all around.Because two medium and low frequency drivers are identical, driving power and phase place are also identical, and the medium and low frequency radiant power is doubled.So just realized this audio amplifier small size, the high-power and omniranges of 360 degree, the acoustic irradiation of full range band, this is the elite place of this loudspeaker box structure just also.

Secondly, the utility model pendulum position is simple relatively, and can be by certain wall reflection, and sound field is proper more naturally like this.Actual audition shows: have very strong telepresenc by 5.1 cinema systems of sending type radiation audio amplifier to be formed, bass extends very low, and dynamics is pure, of tremendous momentum, the mobile and location sharp outline of acoustic image, Sensurround is very strong, when departing from sweet spot, acoustic image changes and is not obvious.

At present, no matter international or domestic, the audio amplifier that adopts 360 degree radiation to take place is more and more, illustrates that this also is an important directions of surround sound playback development.Can predict having increasing ambiophonic system in the near future and adopt 360 degree omnidirectional radiation audio amplifiers, and get a good chance of becoming a kind of mode of surround sound sound field rebuilding of standard.

For professional digital camera, it is also extremely important that it builds acoustic form, under most of situation, can not make special building acoustics design for middle-size and small-size movie theatre, and this also is that most of this class cinema system does not reach one of major reason of better acoustic efficiency.Therefore, the sound field rebuilding that adopts our custom-designed wide radiation audio amplifier to build under the condition for complexity is very easy, its pendulum position also has no special requirements, the more important thing is that the utility model makes acoustic energy diffusion very balanced to making full use of of reflection, direct sound wave and reflected sound can be not separate but flexible fusion.Therefore best listening zone is much wideer than the sound field that general audio amplifier produces, this just the utility model be that digital camera will reach the target that good acoustic efficiency designs.

Description of drawings

Fig. 1 is the utility model schematic diagram

Fig. 2 is the utility model structural representation

Fig. 3 is the thin bilge construction schematic diagram of the utility model

Embodiment

A kind of type radiation symmetry of sending drives the digital camera audio amplifier, is to be made of cylindrical cavity casing 1,1 ' curve helmet shell 2,2 ' curve cone 3, pillar 6, cylindrical cavity casing 1,1 ' in be equipped with medium and low frequency driver 4,4 ', separation is two ends up and down, and relative in twos; Be equipped with in the middle of it curve helmet shell 2,2 facing each other ', curve helmet shell 2,2 ' in be equipped with high frequency driver 5,5 ', curve cone 3 place curve helmet shell 2,2 ' between, by pillar 6 respectively with curve helmet shell 2,2 ', curve cone (3), and cylindrical cavity casing 1,1 ' be connected as a single entity.

The audio amplifier that constitutes by cylindrical cavity casing 1,1 ' curve conical shell 2,2 ' curve cone, 3 three sets of curves cones, its effect is that the radiative acoustic wave of driver element facing each other is up and down guided, because the curve cone has nonlinear transient characteristic, can effectively suppress the unnecessary reflection and the refraction of sound wave, this characteristic shows important especially under big acoustic pressure effect.Like this, from the sound wave of the medium-high frequency section at radiator middle part and low-frequency range sound wave from radiator top and bottom, merge through three cone structure water conservancy diversion and at the radiator middle part respectively and in the modes of 360 degree to radiation all around.Because high frequency sound wave and the medium and low frequency sound wave distance when merging is very near, normally listening on the distance, be similar to point sound source, so its phase characteristic is fine, the voice performance is splendid, locatees first-class.It is good more the closer to its phase characteristic of bass unit that this is similar to traditional audio amplifier voice unit a little, the sound field stationkeeping ability is strong more, and distance is that zero (voice unit is produced on bass unit middle part, so-called coaxial concurrent when between voice unit and bass unit, point sound source), phase characteristic the best.

Claims (1)

1, a kind of type radiation symmetry of sending drives the digital camera audio amplifier, it is characterized in that constituting by cylindrical cavity casing (1,1 ') curve helmet shell (2,2 ') curve cones (3), pillar (6), medium and low frequency driver (4,4 ') is housed in the cylindrical cavity casing (1,1 '), separation is two ends up and down, and is relative in twos; Be equipped with curve helmet shell facing each other (2,2 ') in the middle of it, high frequency driver (5,5 ') is housed in the curve helmet shell (2,2 '), curve cone (3) places between the curve helmet shell (2,2 '), respectively curve cone (3), curve helmet shell (2,2 ') is connected as a single entity with cylindrical cavity casing (1,1 ') by pillar (6).

Images