CN204362286U - Upwards reflect booster-type speaker system - Google Patents
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Abstract
A kind of use the reflective sound wave of " elastic reactance supercharging " principle/upwards speaker system (UIS)---the angle α of loud speaker acoustic axis and rectangular coordinate system in space Y-axis meets following relation: 60 °≤α < 90 °; The angle β of loud speaker acoustic axis and rectangular coordinate system in space X-axis meets following relation: 0 ° of < β≤45 °; Loud speaker can layered arrangement along rectangular coordinate system in space Z-direction, number of plies n >=1.UIS adopts " vertical sound field " and " lower source of sound " to design---meet physiology/psychologic acoustics requirement, not easily cause auditory fatigue, noise pollution is little, effectively can solve the contradiction (green health sound equipment) between traditional sound equipment " efficiency/acoustic pressure and health/environmental protection "; Can 360 ° of radiation, the sensation of " background music "---be more suitable for PC sound equipment near sound field and listen to.Loud speaker " stealth " designs, and can expand the space of industrial design.
Description
Technical field
The utility model relates to a kind of speaker system---and be a kind of utilization " elastic reactance supercharging " principle specifically, the upwards speaker system of reflective sound wave.
Background technology
" image theory "---the radiated sound field in the previous bead source of rigid walls, can be considered the synthesis sound field (reflection) that this bead source and " virtual source " in its symmetric position produce---is equivalent in " homophase ball source ".
General theory is thought---" rigid walls reflection supercharging " utilizes " image theory ", but loud speaker is " pulsation ball source " (the radially same amplitude of ball source surface each point/same-phase vibration) not, but " dipole " (amplitude identical/phase place is contrary).
At present, the woofer system that is mainly (as ground booster-type subwoofer) of " rigid walls reflection supercharging " is used.Ground booster-type subwoofer is placed in desktop mostly, be actually " desktop supercharging ", be mainly diffraction/and non-reflective---wavelength of 200Hz sound wave is 1720mm, is greater than Desktop Dimensions (being generally 900 × 500mm)---therefore " rigid walls reflection supercharging " non-used " image theory ".
Some Notebook computer loud speakers also adopt " upwards reflective " to design (being placed in fuselage bottom)---but due to finite volume, loud speaker bore is too little, tonequality is poor---as the accessory structure of computer, and dependent " speaker system ".
Generally " 360 ° of radial patterns " sound equipment mainly adopts loud speaker upwards radiation scheme---and utilizing " waveguiding effect " of deflection cone, making sound wave along propagating to horizontal direction.As Mirage Omnipolar technology (with reference to Chinese patent CN1647579A " loud speaker with shaped sound field ").Due to deflection cone relative to desktop or floor area little, its " supercharging " limited use (especially low frequency).
Horn loudspeaker (Horn loudspeakers) belongs to indirec radiation formula loud speaker, and its efficiency is high---but no matter positive horn or opposite sign cylinder, all inevitably produce " standing wave resonance ", sound coloration causes tonequality deterioration.
Tradition sound equipment mostly also exist between one " acoustic pressure and health/environmental protection " contradiction---" volume has been opened little not go out effect; Open greatly and not only oneself be difficult to stand, also can affect surrounding neighbours "---the especially PC multi-media sound system listened to of AV home theater and " near sound field ".
Because the electro-acoustic conversion efficiency of general loud speaker approximately only has about 1%---sound equipment often adopts the mode increasing power output (RMS), obtain higher sound pressure level (SPL), pursue a kind of high-power/" being packed " effect of Larger Dynamic.The mistaken ideas of this design also do not meet " physiology/psychologic acoustics " requirement, easily cause auditory fatigue; And can noise pollution be produced---and neither energy-conservation, also unhealthy/environmental protection.
Summary of the invention
The utility model object be to provide a kind of acoustic radiation efficiency high/speaker system that tonequality is soft---solve the contradiction between traditional sound equipment " efficiency/acoustic pressure and health/environmental protection ".
The technical solution of the utility model is---loud speaker is placed in downward radiation bottom audio amplifier, and by the rigid walls such as desktop or ground to reflective sound wave above side, audio amplifier adopts foot pad to support; The angle α of vertical direction loud speaker acoustic axis and rectangular coordinate system in space (three Cartesian coordinates) the Y-axis angle of desktop or ground (namely with) meets following relation: 60 °≤α < 90 °; The angle β of horizontal direction loud speaker acoustic axis and rectangular coordinate system in space X-axis meets following relation: 0 ° of < β≤45 ° (with reference to Fig. 1); Loud speaker can layered arrangement along rectangular coordinate system in space Z-direction, number of plies n >=1.
Radiation impedance Zr comprises radiation resistance Rr and the anti-Xr of radiation (Zr=Rr+jXr)---and radiation resistance (Rr) represents the ability of sound source to working medium radiation acoustic energy; Radiation anti-(Xr) representative " idle acoustic energy ", be stored near field, and non-radiating is gone out.It is generally acknowledged, radiation anti-(Xr) is " mass reactance " (Xm), i.e. " spurious radiation quality " (Mr)---and in fact, radiation is anti-also comprises " elastic reactance " (Xe)." mass reactance " is equivalent to induction reactance (X
l), " elastic reactance " is equivalent to capacitive reactance (X
c)." air displacement " (V) that " mass reactance " (Xm) and speaker system are vibrated is directly proportional---" air displacement " (V) is relevant with body speed (u)---V ↑ → u ↑ → Wr ↑ (Wr=u
2za).
" air spring "---sound wave is compressional wave, air is Elastic medium, when propagating in atmosphere, (compression/expansion)---" air spring " coefficient of elasticity Km ↑ → radiation resistance Rr ↑ (potential energy → kinetic energy) " is held and becomes " in air vibration generation, compact part (Km ↑)-part of rarefaction (Rr ↑).Km ↑ → elastic reactance Xe (capacitive reactance X
c) ↑ → radiation resistance Rr ↑, then acoustic pressure Pa ↑ (Pa=uRr)/radiated Wr ↑ (Wr=u
2rr/2), acoustic radiation efficiency σ r increases---and Xr (Xe/Xm) represents potential energy, and Rr represents kinetic energy, and potential energy can be converted into kinetic energy.
Horn loudspeaker (Horn loudspeakers) belongs to indirec radiation formula loud speaker---and the sound pipe that " horn " i.e. sectional area gradually changes is exactly in fact increase acoustic pressure Pa/ radiated Wr by increasing the anti-Xr of radiation (Xm/Xe)---therefore its efficiency is high.
Acoustic impedance Za (wave impedance)---the acoustic pressure on certain surface and the complex ratio of volume flow.Elastic reactance Xe is relevant to acoustic impedance, but not identical concept---elastic reactance emphasizes radiation potential energy; And acoustic impedance emphasizes the inhibition of medium to sound wave.
" elastic reactance supercharging " principle---loudspeaker radiates sound wave, by rigid walls reflection or diffraction such as desktop/floor/walls, there is " supercharging " (Pa) effect---rigid walls reflection or diffraction can make elastic reactance Xe (the anti-Xr of radiation) increase, " air spring " coefficient of elasticity Km ↑ → elastic reactance Xe ↑ → radiation resistance Rr ↑, then acoustic pressure Pa increases, and radiated Wr promotes.Although there is energy loss in " stiff end reflection " (wave impedance Za=∞)---because acoustic pressure increases, acoustic radiation efficiency σ r improves.
" rigid walls reflection supercharging " (ground booster-type subwoofer) non-used " image theory "---but " elastic reactance supercharging " principle.
Frequency f ↓ → wave number K ↓ → " air spring " coefficient of elasticity Km ↓ → radiation resistance Rr ↓ → Wr ↓---therefore " low frequency is more difficult than high frequency radiation ".Ground booster-type subwoofer utilizes " elastic reactance supercharging " principle---" air spring " coefficient of elasticity Km ↑ → elastic reactance Xe ↑ → radiation resistance Rr ↑ → acoustic pressure Pa ↑ and, the acoustic radiation efficiency of low frequency can be increased.
Time loud speaker acoustic axis vertical with rigid walls (angle α=90 °)---the elastic reactance Xe that reflection produces is maximum, " supercharging " most pronounced effects.During angle α ≠ 90 ° of loud speaker acoustic axis and rigid walls, non axial radiative acoustic wave and rigid walls still can structure angle in 90 ° (vertical)---especially medium and low frequencies, and its directive property is good.
Relative to sound diffraction---the elastic reactance Xe of sound reflecting is larger, " supercharging " better effects if.When wave length of sound is greater than baffle size, there is diffraction/and non-reflective---therefore " ground supercharging " effect of woofer system is better than " desktop supercharging " and " end face supercharging " (audio amplifier top arranges baffle), " metope supercharging " effect is similar to " ground supercharging ".
" upwards reflect booster-type speaker system "---the reflecting Upward & Increasing Pa mode loudspeaker System (hereinafter referred to as UIS).In fact, UIS belongs to indirec radiation formula loud speaker, is similar to horn loudspeaker---and be all increase acoustic pressure Pa/ radiated Wr by increasing the anti-Xr of radiation, thus promote electro-acoustic conversion efficiency.Different from horn loudspeaker, UIS is not owing to adopting sound pipe structure, and " waveguide standing wave resonance device " effect (λ/2 or λ/4 standing wave) is also not obvious---the tonequality deterioration problem that horn loudspeaker standing wave resonance " sound coloration " therefore can be avoided to cause.
---vibrational system mass M m/ support system Cm and the back cavity acoustic compliance Ca/ acoustic resistance Ra (Rm/Rr) of loud speaker/passive radiator are formed " series resonance " respectively---between loud speaker and rigid walls, acoustic space mainly considers acoustic compliance Ce (Xe=1/ ω Ce) to UIS acousto-electro-mechanical analogue figure (with reference to Fig. 3).
At present, that uses " elastic reactance supercharging " principle is mainly woofer system, and woofer system frequency response is generally fo-200Hz." elastic reactance supercharging " principle is applied to full range speaker (frequency response is generally 100-18k Hz) by UIS, and the frequency range promoting radiated and acoustic radiation efficiency is larger---therefore have more realistic meaning (energy-conservation/low-carbon (LC)).
" upwards reflective " Notebook computer loud speaker and UIS similar, but both art there are differences---the former is the accessory structure of computer; The latter is " speaker system ", establishes one's own system, and has independently body structure---the application space of " elastic reactance supercharging " principle can be expanded.
Generally " 360 ° of radiation " sound equipment mainly adopts loud speaker upwards radiation scheme (being mostly Miniature acoustics), utilizes " waveguiding effect " of deflection cone---and its " elastic reactance supercharging " limited use, efficiency is lower than UIS.The best listening location of the program is and people's ear parallel height---this does not also meet the feature of putting of general Miniature acoustics; This programme then adopts downward radiation/to reflective sound wave above side---and it is larger to listen to angle/scope, and tolerance is better than it.Desktop or floor measurements (area) larger than deflection cone---acoustic reflection is stronger, and " elastic reactance supercharging " effect is significantly (especially low frequency).Relative to deflection cone---UIS utilizes the plane reflection on desktop or ground, and effect is similar, but structure/process is simpler, and cost is lower.
" acoustic pressure controlling " is although in fact its energy-flux density I of---indirec radiation formula loud speaker acoustic pressure is high, and good to the controlling of acoustic pressure, potential energy is greater than kinetic energy---event is less than direct-radiator speaker.Increase acoustic pressure equally---direct-radiator speaker (raising volume) mainly directly increases radiation resistance Rr, increases kinetic energy, and energy-flux density I increases, and acoustic stimuli/noise pollution is large, and " green " is poor; " do little by little without a break "---indirec radiation formula loud speaker mainly increases radiation resistance Rr indirectly by increasing the anti-Xr of radiation, increases potential energy (not quickly being gone out by radiating acoustic energy).Same sound pressure---indirec radiation formula loud speaker due to efficiency high, the amplitude A of transducer is little, then little (the I=2 π of energy-flux density I
2a2f
2ρ u)---" green " is good, and distortion is less.
UIS can be formed " acoustic filter "---and some frequency (high frequency) is due to directive property reduction, and sound pressure level SPL declines, then energy-flux density I reduces, and acoustic stimuli/auditory fatigue reduces.In fact, most of adult with advancing age, hearing can fail gradually---high frequency limit fmax generally only has 13-15kHz (audible sound wave fmax is 20kHz).Too pursuing high frequency response, may be doing " idle work " in fact.
Directly, based on direct sound wave (axial/non axial), energy-flux density (sound intensity) is large for " horizontal sound field "---sound field direction and people's ear-lobe---and traditional sound speaker system is mainly " horizontal sound field ".
" vertical sound field "---sound field direction is parallel with people's ear, and based on reflected sound/non axial direct sound wave, energy-flux density (sound intensity) is little, has " green ".
" ecosystem "---occurring in nature, sound is generally based on reflected sound/non axial direct sound wave, and this " sounds of nature " can make people feel relief nature." vertical sound field " although sound equipment efficiency/Hz-KHz reduces, levels are rich, naturally soft---people can be made to obtain listening to of a kind of uniqueness and to experience (background music).UIS is mainly " vertical sound field ", and owing to using " elastic reactance supercharging " principle to promote radiation efficiency/adjustment Acoustic Wave Propagation direction, both had general sensation as " vertical sound field " sounds of nature, efficiency/tonequality is better than it again.
Vestibular nerve/semicircular canal is relevant to the sense of equilibrium---and gravitational strong and weak information is supplied to vision system by vestibular nerve, form the orientation concept (space visual perception) such as distance/just/front and back, vestibular nerve and other system are as closely bound up in auditory system/emotional center etc.People's ear can " tracking " sound by the light of nature---therefore ear's state of sound source position decider, and head state also adjusts automatically along with ear follows source of sound.Although people at every moment can't note the position of source of sound---it still can be had an impact to people by the subconsciousness of people, in mood and the psychological condition of " subtle " middle left and right people.
Vestibular nerve is in tension, and the irritability of people improves for " upper source of sound " (source of sound higher than people's ear)---people can be made to hold head high in spite of oneself, sympathetic activation, blood pressure raises---.
" lower source of sound " (source of sound lower than people's ear)---head part then can be made to naturally droop, and parasympathetic nerve is excited, and blood pressure reduces---and vestibular nerve is in relaxation state, people is felt relief comfortable.
UIS downward radiation/to reflective sound wave above side,---belong to " lower source of sound ", more easily make people loosen relative to conventional loudspeaker systems, acoustic stimuli are little---meets physiology/psychologic acoustics requirement, has " green ".
The utility model has following beneficial effect---
" acoustic power amplifier " (Acoustical Power Amplifier)---UIS can increase the anti-Xr of radiation, increase acoustic pressure Pa/ radiated Wr and acoustic radiation efficiency σ r---relative to electronic system power amplifier, more " green low-carbon is energy-conservation ".
Miniature acoustics due to loud speaker bore/power output (RMS) little, acoustic pressure/radiated is little---UIS is more suitable for the new media Miniature acoustics representing following sound equipment development trend.
Although the advantage of UIS is sound field/but not tonequality---relative to traditional Hi-Fi sound equipment, knot image force/location sense/Hz-KHz reduces, but its sound field broad/nature/truly (360 ° of radiation)---play the same tune on different musical instruments with Bose " direct/reflective sound system ".
The sound thin relative to direct-radiator speaker---indirec radiation formula loudspeaker sound, through " fermenting ", becomes mellow, hang on, and the degree of depth/range of sound field increases, telepresenc good (being more suitable for performance AV/GAME audio).
" flat be only true "---UIS does not pursue vigorous stimulus to the sense organ, freely/casual, do little by little without a break, have the sensation of one " background music "---meet the Leisure Consumption theory of " intellectual epoch " post-modernist.
Identical output acoustic power, energy-flux density and directive property are inversely proportional to---and UIS directive property is good, and acoustic energy disperses, therefore its tonequality is soft; Relative to direct sound wave, reflection/diffraction sound wave energy-flux density is little---therefore UIS not easily causes auditory fatigue, and noise pollution is little, has " green ".
" only hear its sound/lose its shape "---UIS loud speaker " stealth " designs, and visual effect is succinct/modern/mysterious, can expand the space of industrial design.
Accompanying drawing explanation
Fig. 1 is angle schematic diagram (α/β)
Fig. 2 is UIS acousto-electro-mechanical analogue figure
Fig. 3 is UIS structural representation (α=75 °/n=1)
Fig. 4 is UIS structural representation (band base)
Fig. 5 is stereo " integration " structural representation (α=60 °/n=1)
Fig. 6 is UIS passive radiator structural representation (α=60 °/n=1)
Fig. 7 is multiple unit " multi-story frame type " structural representation
Fig. 8 A is multichannel " multi-story frame type " structural representation/Fig. 8 B is its angle β schematic diagram
Fig. 9 is multichannel " multi-story frame type " structural representation (Bass)
Wherein---
1-full range speaker, 2-high frequency unit, 3-intermediate frequency unit, 4-low frequency cell, 5-passive radiator, 6-C channel loudspeaker,
7-L channel loudspeaker, 8-R channel loudspeaker, 9-SL channel loudspeaker, 10-SR channel loudspeaker, 11-Bass channel loudspeaker,
12-desktop or ground, 13-foot pad, 14-base, 15-laminate
Embodiment
With reference to Fig. 3---full range speaker (1) is placed in bottom audio amplifier, audio amplifier adopts foot pad (12) to support, angle α=75 ° of vertical direction loud speaker acoustic axis and desktop (11), number of plies n=1.
Because audio amplifier bottom space is limited, audio amplifier base area should not be excessive---and this programme generally adopts full range speaker (not frequency division), also can adopt coaxial loudspeaker (frequency division).Cone loudspeaker is more conducive to sound diffusion than the acoustic reflection angle of panel speaker, realize 360 ° of acoustic radiations, but " bending wave mode loudspeakers " is " radiation of randomness vibration/dispersivity " in medium-high frequency section, is equivalent to " diffuse reflection "---therefore can also adopt BMR (balanced mode radiator).
Loud speaker acoustic axis meets following relation from the angle α on desktop or ground: 60 °≤α < 90 ° (α is acute angle)---α is different, and directive property is to listen to effect also different.During α=90 °---" elastic reactance supercharging " effect strengthens, but the axial sound wave of high frequency is not easy blaze abroad (wavelength is little, and diffraction weakens), and can standing wave be produced, Hz-KHz declines, tonequality deterioration---therefore it is suitable for low frequency system, and be unsuitable for full range speaker system.
During α ≠ 90 °---" although elastic reactance supercharging " declines, but high frequency response/knot image force/location sense/definition improves, music " color sense " is good, more vividly---and a kind of balance can be obtained between " green " and " Hi-Fi ", also be more suitable for AV/GAME.Towards the direction of user, reflected wave modal density increases, and Wr increases; Rightabout then reflected wave/Wr reduces, and therefore its directive property has more specific aim, and efficiency improves, and small volume also can obtain good listens to effect.During α ≠ 90 °, directive property can be selected, and listening location is relatively fixing, is more suitable for PC sound equipment---when α is close to 90 °, " entirely pointing to " radiation (360 °) although tonequality declines, can be formed.
The distance L on audio amplifier bottom surface and desktop or ground is 9-60mm (α=90 °), and general Miniature acoustics is 9-20mm; Bookshelf case/the case that lands is 20-60mm---can first determine height then adjusting angle (α ≠ 90 °) according to mentioned above principle.
The distance L on audio amplifier bottom surface and desktop or ground increases, and mass reactance Xm increases, and air displacement V increases, radiated Wr increases---but L is excessive, and elastic reactance Xe reduces, and reflects insufficient, " elastic reactance supercharging " declines, decrease in efficiency, standing wave resonance can cause sound coloration.L is too small---and Xe increases, and " pinch effect " makes sound not unfold, and definition/stereovision declines, and sound wave interference (high frequency) is obvious, and LF-response is poor.
Foot pad can adopt rigid material (as metal/timber/ABS etc.), also can adopt elastomeric material (as rubber/PP etc.)---and the former is suitable for landing case/bookshelf case, and the latter is suitable for Miniature acoustics etc.Factors such as composite sound mathematic(al) parameter optimization/structural stability---loud speaker acoustic axis and desktop or ground angle α and height of foot pad generally adopt fixed value---but also can freely adjust within the specific limits, obtain different directive property and listen to effect.Foot pad can adopt metal helical structure (with reference to Fig. 6), is similar to jack, adjustable-height---can also highly carry out adjusting angle α by regulating, more flexibly and easily---but the requirement of 60 °≤α < 90 ° should be met.
General rectangular box four foots pad, small cylindrical casing can with three foots pad---during α=60 °, can only with a foot pad, its opposite side casing lands support.Casing angle of inclination if excessive (α < 60 °), easy overturning, structural stability declines---and reflected wave minimizing/direct wave increases, " elastic reactance supercharging " declines, decrease in efficiency; And energy-flux density I increases, " green " is poor.
Foot pad can adopt " turning shape " structure (with reference to Fig. 4)---and up/down portion is combined with vertical angle with audio amplifier bottom surface/desktop or ground, improve machinability/structural stability, and foot pad bottom can adopt globoidal structure (as spherical), be conducive to adjusting angle α (with reference to Fig. 6).Base (with reference to Fig. 4) can be set up---structural stability/add strong reflection can be improved, but height of foot pad can only be fixed value, helical structure cannot be adopted to regulate height, and the distance L of audio amplifier bottom surface and base is 9-60mm (α=90 °).
Structure that UIS generally adopts " split type " (stereo 2.0 systems), all right ad hoc low frequency system (same employing " elastic reactance supercharging " design), " 2.1 system "---UIS also can be used for formation " 5.1 system " (AV/GAME).UIS can adopt stereo " integration " structure (with reference to Fig. 5)---and two loud speakers (L/R sound channel) are also placed in bottom same audio amplifier, the all right function such as integrated audio process/broadcasting/amplification and FM broadcast receiver/wireless transmission, is more suitable for new media Miniature acoustics.Portable minisize sound equipment can adopt single loud speaker Mono structure (L+R), also can adopt " double voice coil " loud speaker (4 lead-in wire), binaural signal inputs respectively it (parallel connection) after IC amplifies---" stereophonic widening " audio of mono speaker can be realized.
UIS adopts " fully sheathed case+passive radiator " structure---and can make full use of the radiation acoustic energy at the loud speaker back side, avoid " acoustic short circuit ", passive radiator quantity is one or more (low frequency system/each layer full range speaker systems).With reference to Fig. 6.
UIS can adopt the modeling structures such as " UFO "/" pyramid "/" two-sided drum " (with reference to Fig. 6)---expand the space of industrial design.Audio amplifier bottom margin can adopt color LED annular lamp decoration---and brightness, with the change of loudspeaker signal level, improves ornamental.
UIS can adopt " multi-story frame type " structure (rectangular coordinate system in space Z-direction number of plies n > 1)---and mainly utilize desktop or ground and each plate reflection/diffraction sound wave layer by layer, more than the second layer can adopt foot pad (ground floor also can).Each layer loud speaker can be identical sound channel/different frequency range unit (frequency division); Also can be the Whole frequency band unit of different sound channel.The former can obtain wider frequency response, and " intermodulation distortion " (IMD), thus tonequality more Hi-Fi---the latter is suitable as " preposition circulating type multi-channel audio system " (as F-SMS) in reduction.
Angle α/β that vertical direction each layer loud speaker is identical or different from the angle α of coordinate system X-axis---the angle β of horizontal direction each layer loud speaker and coordinate system Y-axis is identical or different---is different, can obtain the sound field effect of more multi-layered time and different directive property.Medium-high frequency unit can adopt Open architecture---and " two-way dipole radiation " makes full use of the radiation acoustic energy of loud speaker, raises the efficiency." multi-story frame type " structure makes full use of vertical space, saves horizontal space---and multiple unit/multichannel " integration " thus can be adopted to design, and desktop is more succinct, is suitable for PC sound equipment.
UIS multiple unit frequency division " multi-story frame type " structure is with reference to Fig. 7---horizontal direction each layer loud speaker identical with the angle β of coordinate system X-axis (β=1 °); Vertical direction each layer loud speaker can be different from the angle α of coordinate system Y-axis---wherein high frequency unit α=60 °, intermediate frequency unit α=75 °, low frequency cell α=85 °.Low frequency cell adopts " semi open model " structure---frame supported (without foot pad), and loud speaker front is open, and the back side is closed.High frequency/intermediate frequency unit can adopt " open " structure.
UIS multichannel " multi-story frame type " structure is with reference to Fig. 8---each layer loud speaker identical with the angle α of coordinate system Y-axis (α=75 °); Each layer loud speaker is different from the angle β of coordinate system X-axis---wherein center channel (C) β=15 ° (turning to inner side), main sound channel (L/R) β=1 °, surround channel (SL/SR) β=15 ° (turning to outside)." open " structure can be adopted.
Arranging each channel loudspeaker according to frequency response/directional characteristics, reflected wave angle and listening location matched---main sound channel (L/R) is Whole frequency band, and high frequency has directive property, and reflected wave angular range is little, therefore is placed in bottom; Center channel (C) voice is medium and low frequency, and reflected wave angular range is comparatively large, is placed in intermediate layer; Surround channel (SL/SR) background effect sound is based on low frequency, and reflected wave angular range is large, is placed in upper strata.
2 " multi-story frame type " audio amplifiers are placed in PC/TV display both sides respectively, multichannel " 5.1 system " (preposition circulating type multi-channel audio system) is formed with Bass---" multi-story frame type " audio amplifier also can increase Bass channel loudspeaker, forms F-SMS " 2+ system " (with reference to Fig. 9).
Claims (6)
1. a speaker system, loud speaker is placed in downward radiation bottom audio amplifier,
By the rigid walls such as desktop or ground to reflective sound wave above side, audio amplifier adopts foot pad to support, and it is characterized in that
The angle α of loud speaker acoustic axis and rectangular coordinate system in space Y-axis meets following relation: 60 °≤α < 90 °;
The angle β of loud speaker acoustic axis and rectangular coordinate system in space X-axis meets following relation: 0 ° of < β≤45 °;
Loud speaker can layered arrangement along rectangular coordinate system in space Z-direction, number of plies n >=1.
2. speaker system according to claim 1, is characterized in that
Described speaker types comprises full range speaker/coaxial loudspeaker and BMR balanced mode radiator, adopts wherein a kind of.
3. speaker system according to claim 1 and 2, is characterized in that
Described foot pad adopts metal helical structure, adjustable-height.
4. speaker system according to claim 1 and 2, is characterized in that
There is at least one passive radiator.
5. speaker system according to claim 1, is characterized in that
During rectangular coordinate system in space Z-direction number of plies n > 1,
Each layer loud speaker is the Whole frequency band unit of different sound channel or the different frequency range unit of identical sound channel.
6. speaker system according to claim 1 or 5, is characterized in that
The angle α of each layer loud speaker vertical direction is identical or different;
The angle β of each layer loud speaker horizontal direction is identical or different.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107484046A (en) * | 2017-08-31 | 2017-12-15 | 摩米士科技(深圳)有限公司 | A kind of sound box bracket |
| CN109040908A (en) * | 2018-09-04 | 2018-12-18 | 音王电声股份有限公司 | A kind of ring screen loudspeaker array and its control method with directive property |
| CN109151661A (en) * | 2018-09-04 | 2019-01-04 | 音王电声股份有限公司 | A kind of forming method of ring screen loudspeaker array and virtual sound source |
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2015
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107484046A (en) * | 2017-08-31 | 2017-12-15 | 摩米士科技(深圳)有限公司 | A kind of sound box bracket |
| CN109040908A (en) * | 2018-09-04 | 2018-12-18 | 音王电声股份有限公司 | A kind of ring screen loudspeaker array and its control method with directive property |
| CN109151661A (en) * | 2018-09-04 | 2019-01-04 | 音王电声股份有限公司 | A kind of forming method of ring screen loudspeaker array and virtual sound source |
| CN109151661B (en) * | 2018-09-04 | 2020-02-28 | 音王电声股份有限公司 | Method for forming ring screen loudspeaker array and virtual sound source |
| WO2020047931A1 (en) * | 2018-09-04 | 2020-03-12 | 音王电声股份有限公司 | Directional screen-surrounding speaker array and control method thereof |
| WO2020047930A1 (en) * | 2018-09-04 | 2020-03-12 | 音王电声股份有限公司 | Ring screen speaker array and virtual sound source formation method |
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