CN203761568U - Band-pass type low pitch sound box - Google Patents
Band-pass type low pitch sound box Download PDFInfo
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- CN203761568U CN203761568U CN201420078198.0U CN201420078198U CN203761568U CN 203761568 U CN203761568 U CN 203761568U CN 201420078198 U CN201420078198 U CN 201420078198U CN 203761568 U CN203761568 U CN 203761568U
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Abstract
The utility model relates to the electroacoustic technology field and specifically relates to a band-pass type low pitch sound box and an adjusting method thereof. The band-pass type low pitch sound box comprises a low pitch sound box, wherein at least a horizontally arranged separator plate is arranged in the low pitch sound box, the separator plate is provided with at least one low frequency loudspeaker, a box wall of the low pitch sound box is provided with low frequency resonators that are arranged above and below the separator plate, the low pitch sound box is divided into upper and lower low frequency low pitch sound boxes, the low pitch sound box is provided with a pressure adjustment cabin, the outer cross section of each low frequency resonator is connected with the pressure adjustment cabin and therefore an acoustic resonance passageway, the pressure adjustment cabin is provided with damping holes, a sound-absorbing body is arranged in the pressure adjustment cabin, the low frequency loudspeaker and a combination mode thereof can be added according to requirements of acoustic characteristics, and the sound box can be adjusted in damping value and Q value through adjustment of the total area of the damping holes and the sound-absorbing body. According to the band-pass type low pitch sound box, the band-pass type low pitch sound box is improved in low frequency processing acoustic performance and quality accuracy and flexibility, the sound box is small in size, and cost can be saved.
Description
Technical field
The utility model relates to electroacoustic techniques field, relates in particular to a kind of band general formula woofer.
Background technology
From sound box acoustic construction, so far, current audio amplifier acoustic construction application mainly contains closed and the large class of open type two to the back of the body chamber open type audio amplifier that nineteen twenty-four occurs, closed audio amplifier kind is less, mainly contains two kinds of air-cushion type and push-pull types.Open type audio amplifier kind is more, as inverted phase type, two-stage inverted phase type, empty cone formula, labyrinth type, band general formula, duct type, rear horn type, 1/4 wavelength loaded type, transmission line formula, the Cole formula etc. of pausing.
The common feature of open type audio amplifier, exactly by take loud speaker as driving the resonance coupling that makes case chamber air and resonator (being commonly referred to phase-reversing tube), to greatest extent speaker drive energy is become to case chamber resonant energy, to improve low-frequency sound pressure and to widen LF-response.The load that has strengthened the diaphragm of loudspeaker due to case chamber resonant energy, significantly generation of vibration to its vibrating diaphragm in resonance band (also claiming resonance frequency) suppresses, thereby reduced loud speaker induced potential, made distortion reduction, the power that also therefore can improve woofer bears volume.
Wherein, it with general formula audio amplifier, is a kind of audio amplifier of special disposal frequency acoustic technology, the mode that this audio amplifier changes has three kinds substantially: a kind of is that loud speaker is placed in the middle of a connected approximate closed audio amplifier and phase inverted cabinet, make face of the diaphragm of loudspeaker according to closed audio amplifier regular movement, another face of the diaphragm of loudspeaker is according to phase inverted cabinet regular movement, and this band general formula audio amplifier only has an opening box chamber, the second is loud speaker to be placed in to the centre of two connected approximate phase inverted cabinets, there are two opening box chambers, the phase inverted cabinet case chamber of one of them approximate upper frequency utilizes the front (or back side) of the diaphragm of loudspeaker to drive, the phase inverted cabinet case chamber of another approximate lower frequency utilizes the back side (or positive) of the diaphragm of loudspeaker to drive, two case chambers are after resonator produces different resonance frequency stacks, its LF-response width is wide compared with the band-pass speaker of first kind of way, also wider than the frequency response width of inverted loudspeaker box and the processing of labyrinth type audio amplifier low frequency, the air mass streaming audio amplifier of U.S. BOES company utility model just belongs to this band general formula audio amplifier, the third is the band general formula audio amplifier with three opening box chambers, above-mentioned, there is the opening box chamber that superposes again in the middle of two opening box chambers, difference is in these three opening box chambers, in the opening box chamber at two ends, respectively install a loud speaker that electric property is identical, the acoustic characteristic of two case chambers must be consistent, case chamber interior in the middle of two case chambers has certain one side of the corresponding diaphragm of loudspeaker of two case chamber loud speakers, and utilization drives sounding of the diaphragm of loudspeaker of case chamber, two ends, on casing baffle, be useful on the resonator of low-frequency resonance with case chamber, two ends one sampling device, this band general formula audio amplifier is because loud speaker doubles, the resonance space of processing low-frequency resonant has increased by 1/3rd, so, its low frequency efficiency and responsive bandwidth are more higher than aforementioned two kinds of band general formula audio amplifiers, also higher than closed audio amplifier and phase inverted cabinet etc., its shortcoming be need to be larger tank-volumes.
Although current band general formula audio amplifier comprehensive advantage on low frequency treatment technology is the most obvious, but still there are some defects in its acoustic construction: first, from acoustic construction, can regard current band general formula audio amplifier as one by case chamber resonance space, three sounding bodies that space is coupled such as tube chamber (resonator) resonance space and free harmonic vibration space (the outer space arbitrarily of casing), even if under the identical condition of atmospheric density, because the free space in three spaces is (as room, open air) volume can not artificially be set, cause case cavity space volume to calculate according to certain set formula, consequently tank-volumes size that is case cavity space size variation underaction, greatly limited the range of application with general formula audio amplifier, as the recording of closely listening audio amplifier and special occasions to use the desktop of current popular, making monitor speaker is just difficult to the larger band general formula audio amplifier of current volume to bring up to desktop, the second, because it must calculate case chamber volume according to certain set formula, the processing of low frequency tone color is lacked and adjusts the means that change, thereby make its satisfied being restricted to audio amplifier low frequency tone color diversified demand, the 3rd, be exactly the limitation that also existence can not be less in the tank-volumes scale of construction, to the saving of human resource, also there are some problems in this, the 4th, uncontrollable due to free space air pressure, also cause case chamber and resonator cavity space air pressure to control limited, make diaphragm of loudspeaker vibration more fully in the air pressure coupling in case chamber, tube chamber, free harmonic vibration space how, it still lacks corresponding solution.
Utility model content
Problem to be solved in the utility model is that existing band general formula woofer tank-volumes is bigger than normal, casing air velocity uncontrollable, be difficult to meet the defects such as bass box tone color and acoustical power diversified demand thereof, a kind of band general formula woofer is provided, it has not only improved accuracy and the flexibility ratio of audio amplifier low frequency processing acoustical behavior and quality thereof, and audio amplifier volume can dwindle, escapable cost and resource.
For achieving the above object, the technical solution adopted in the utility model is: a kind of band general formula woofer, it comprises woofer, in described woofer, there is at least one horizontally disposed dividing plate, described dividing plate is provided with at least one woofer, the woofer tank wall of described dividing plate top and below is provided with low-frequency resonator, described woofer is divided into the low frequency woofer of top and below; Described woofer is provided with pressure regulating chamber, and the outer cross section of described low-frequency resonator connects into an acoustic resonance path with described pressure regulating chamber respectively.
To being further improved to of technique scheme, the woofer tank wall of described dividing plate top is provided with compared with low-and high-frequency resonator, the woofer casing of dividing plate below is provided with lower low-frequency resonator, by described woofer be divided into top compared with the lower low frequency woofer of low-and high-frequency woofer and below.
To being further improved to of technique scheme, in described pressure regulating chamber, be provided with acoustic(al)absorbent, described pressure regulating chamber is provided with damping hole.
Preferably, described damping hole has a plurality of, and horizontal symmetrical is arranged on described pressure regulating chamber.
Preferably, described dividing plate quantity is one, and a woofer is set on described dividing plate, and compositing monomer formula band leads to woofer.
Preferably, described dividing plate quantity is one, equidirectional at least two woofers, the logical woofer of composition complex formula band of being set up in parallel on described dividing plate.
Preferably, described dividing plate quantity is one, and described dividing plate respectively arranges the woofer of a symmetrical reverse parallel connection up and down, forms the logical woofer of push-pull type band.
Preferably, described dividing plate quantity is one, and the woofer of described dividing plate at least two pairs of upper and lower symmetrical reverse parallel connections setting up and down forms the logical woofer of complex push-pull type band.
Preferably, the second partition that is provided with the first dividing plate of level in described woofer and is positioned at the first dividing plate below, between described the first dividing plate and second partition, be provided with low frequency woofer, the tank wall of low frequency woofer is provided with more range low frequency resonator, described the first dividing plate top and described second partition bottom are respectively provided with laterally zygomorphic one or many woofers, form the logical woofer of march-past band.
Band general formula woofer described in the utility model, beneficial effect is compared to existing technology:
The utility model is mainly at multi-functional acoustics pressure regulating chamber of band general formula woofer opening part load, in pressure regulating chamber, be provided with some damping holes or device and have some sound-absorbing materials, form non-complete enclosure space, be equivalent to be provided with between the free space outside audio amplifier resonator and casing spatial transition or a medium-space that air is mutual, and utilize the status of its transition or intermediary, by self space is carried out the variation of damping characteristic or Q value characteristic or is integrated case chamber, sound coupled characteristic between tube chamber and free space, thereby form a kind of novel bass box acoustic construction, form the bass box that is different from current band-pass speaker with self acoustic characteristic.
On the one hand from variations such as mixing function, filter function, voltage regulation function and loudspeaker monomer model application, push-pull mode application, complex model application, apportion model applications, accuracy and the flexibility ratio of not only audio amplifier low frequency being processed to acoustical behavior and quality thereof increase, and under requiring, different designs make low frequency processing and control device have more flexibility, especially compared with small box low frequency, processing, more current audio amplifier has more sensitivity and improves the application advantage that volume dwindles; Because it can adjust its space air pressure neatly, can material usage be can save at the less audio amplifier of design volume under equal low frequency performance standard on the other hand, production cost and social resources further saved.Therefore, to audio amplifier frequency acoustic, technical finesse has the promotion meaning of practical value and electroacoustic techniques development to the utility model.
Accompanying drawing explanation
Accompanying drawing 1 is the basic structure schematic diagram of the utility model embodiment band general formula woofer;
Accompanying drawing 2 is the side structure schematic diagram of the logical woofer of the utility model embodiment 1 monomer-type band;
Accompanying drawing 3 is the side structure schematic diagram of the logical woofer of the utility model embodiment 2 push-pull type bands;
Accompanying drawing 4 is the side structure schematic diagram of the logical woofer of the utility model embodiment 3 complex formula bands;
Accompanying drawing 5 is the side structure schematic diagram of the logical woofer of the utility model embodiment 4 complex push-pull type bands;
Accompanying drawing 6 is the side structure schematic diagram of the logical woofer of the utility model embodiment 5 march-past bands;
Accompanying drawing 7 is the side structure schematic diagram of the logical woofer of the utility model embodiment 6 march-past complex bands;
Accompanying drawing 8 is the mixing effect schematic diagram of the utility model embodiment 1 monomer-type band general formula woofer;
Accompanying drawing 9 is the filter effect schematic diagram of the utility model embodiment 1 monomer-type band general formula woofer.
Wherein:
1, pressure regulating chamber; 11, damping hole; 12, acoustic(al)absorbent; 2, woofer; 21, dividing plate; 22, woofer; 23, compared with low-and high-frequency resonator; 24, lower low-frequency resonator; 25, compared with low-and high-frequency woofer; 26, low frequency woofer; 27, double woofer; 28, the first dividing plate; 29, second partition; 30, range low frequency resonator more; 31, low frequency woofer.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model is described in further detail.
With reference to Fig. 1, band general formula woofer described in the utility model, that pressure regulating chamber of outside, cross section loading 1 formation of resonator is set at woofer 2, woofer 2 is provided with at least one horizontally disposed dividing plate 21, dividing plate 21 is provided with at least one woofer 22, the tank wall of dividing plate 21 tops is provided with compared with low-and high-frequency resonator 23, the tank wall of dividing plate 21 belows is provided with lower low-frequency resonator 24, thereby be divided into compared with low-and high-frequency woofer 25 and low frequency woofer 26 to major general's woofer 2, damping hole 11 is set on pressure regulating chamber 1, the interior acoustic(al)absorbent 12 that arranges of pressure regulating chamber 1, with this, adjust damping and the Q value size of audio amplifier, and from mixing function, filter function, voltage regulation function and loudspeaker monomer model application, push-pull mode application, complex model application, the application of complex push-pull mode, apportion model application, the variations such as march-past complex model application, to adjusting with the acoustical behavior of logical bass box, increase the logical bass box tonequality of band and change the flexibility of adjusting.
Wherein, can also adjust the compound mode of loud speaker according to other needs, be not limited to combinations thereof.Compared with low-and high-frequency woofer 25, be higher with respect to the frequency of low frequency woofer 26, thereby be called compared with low-and high-frequency woofer.Compared with low-and high-frequency resonator 23, be higher with respect to the frequency of lower low-frequency resonator 24, thereby be called compared with low-and high-frequency resonator.But above-mentioned four is all low-frequency.
Embodiment 1:
With reference to Fig. 1, 2, band general formula woofer described in the utility model, for the logical woofer of monomer-type band, be the basic structure of the utility model change application, it comprises a woofer 2, in woofer 2, be provided with the dividing plate 21 of level, dividing plate 21 is provided with woofer 22, dividing plate 21 is divided into upper box and lower box by woofer 2, on the sidewall of upper box, be provided with compared with low-and high-frequency resonator 23, the corresponding sidewall of lower box is provided with lower low-frequency resonator 24, compared with low-and high-frequency resonator 23 and lower low-frequency resonator 24, be positioned on same longitudinal axis, thereby dividing plate 21 is divided into higher-frequency woofer 25 by woofer 2 and compared with low frequency woofer 26.
At woofer 2, be provided with compared with low-and high-frequency resonator 23 and be connected pressure regulating chamber 1 with the outside, cross section of lower low-frequency resonator 24, thereby connect into an acoustic resonance path with pressure regulating chamber 1 respectively compared with low-and high-frequency resonator 23 and the outer cross section of lower low-frequency resonator 24.Pressure regulating chamber 1 with compared with being respectively equipped with damping hole 11 on low-and high-frequency resonator 23 two sidewalls adjacent with lower low-frequency resonator 24, on damping hole 11, have a plurality of, and bilateral symmetry setting.In pressure regulating chamber 1, be also provided with acoustic(al)absorbent 12, acoustic(al)absorbent 12 is attached to the pressure regulating chamber corresponding with resonator 1 chamber wall.
The present embodiment is under the basic acoustic construction described in Fig. 1, installs the logical woofer of monomer-type loaded ribbon that a woofer 22 forms on dividing plate 21.
Embodiment 2:
With reference to Fig. 3, band general formula woofer described in the utility model, for Fig. 1, described in 2, with general formula woofer changes, raw push-pull type band leads to woofer, it comprises a woofer 2, in woofer 2, be provided with the dividing plate 21 of level, dividing plate 21 is provided with woofer 22 above, dividing plate 21 bottoms be provided with electric property identical with woofer 22 but act as supercharging double woofer 27, dividing plate 21 is divided into upper box and lower box by woofer 2, on the sidewall of upper box, be provided with compared with low-and high-frequency resonator 23, the corresponding sidewall of lower box is provided with lower low-frequency resonator 24, compared with low-and high-frequency resonator 23 and lower low-frequency resonator 24, be positioned on same longitudinal axis, thereby dividing plate 21 is divided into higher-frequency woofer 25 by woofer 2 and compared with low frequency woofer 26.
At woofer 2, be provided with compared with low-and high-frequency resonator 23 and be connected pressure regulating chamber 1 with the outside, cross section of lower low-frequency resonator 24, thereby connect into an acoustic resonance path with pressure regulating chamber 1 respectively compared with low-and high-frequency resonator 23 and the outer cross section of lower low-frequency resonator 24.Pressure regulating chamber 1 with compared with being respectively equipped with damping hole 11 on low-and high-frequency resonator 23 two sidewalls adjacent with lower low-frequency resonator 24, on damping hole 11, have a plurality of, and bilateral symmetry setting.In pressure regulating chamber 1, be also provided with acoustic(al)absorbent 12, acoustic(al)absorbent 12 is attached to the pressure regulating chamber corresponding with resonator 1 chamber wall.
The present embodiment is under basic acoustic construction prerequisite described in embodiment 1, lower device woofer 22 and the woofer that doubles two reverse parallel connections such as woofer 27 grades on dividing plate 21, make two loud speakers form push-pull type motion, thus under the vibration area prerequisite identical with monomer, make oscillating mass multiplication, and then speaker drive energy is doubled, impel case cavity space acoustic voiume demultiplication under the identical prerequisite of performance of similar structures, thereby reach the object of dwindling bass box volume, form the logical woofer of push-pull type band.
Embodiment 3:
With reference to Fig. 4, band general formula woofer described in the utility model, for Fig. 1, described in 2, basic structure is that monomer-type loaded ribbon general formula woofer changes and the raw logical woofer of complex formula band from embodiment 1, it comprises a woofer 2, in woofer 2, be provided with the dividing plate 21 of level, dividing plate 21 is provided with at least two above, can be many woofers arranged side by side 22, dividing plate 21 is divided into upper box and lower box by woofer 2, on the sidewall of upper box, be provided with compared with low-and high-frequency resonator 23, the corresponding sidewall of lower box is provided with lower low-frequency resonator 24, compared with low-and high-frequency resonator 23 and low-frequency resonator 24, be positioned on same longitudinal axis, thereby dividing plate 21 is divided into higher-frequency woofer 25 by woofer 2 and compared with low frequency woofer 26.
At woofer 2, be provided with compared with low-and high-frequency resonator 23 and be connected pressure regulating chamber 1 with the outside, cross section of lower low-frequency resonator 24, thereby connect into an acoustic resonance path with pressure regulating chamber 1 respectively compared with low-and high-frequency resonator 23 and the outer cross section of lower low-frequency resonator 24.Pressure regulating chamber 1 with compared with being respectively equipped with damping hole 11 on low-and high-frequency resonator 23 two sidewalls adjacent with lower low-frequency resonator 24, on damping hole 11, have a plurality of, and bilateral symmetry setting.In pressure regulating chamber 1, be also provided with acoustic(al)absorbent 12, acoustic(al)absorbent 12 is attached to the pressure regulating chamber corresponding with resonator 1 chamber wall.
The present embodiment is the change application on embodiment 1 basis, i.e. many woofers 22 in parallel in the same way on dividing plate 21, its vibration area is doubled compared with monomer-type, simultaneously by audio amplifier volume multiplication, thereby reach, expand bass box volume to improve acoustic pressure be the logical woofer of complex formula band that formed many loud speakers of object of sensitivity move simultaneously.
Embodiment 4:
With reference to Fig. 5, band general formula woofer described in the utility model, with Fig. 1, described in 2, be with general formula woofer structure for basis, from embodiment 2, change and the raw logical woofer of complex push-pull type band, it comprises a woofer 2, in woofer 2, be provided with the dividing plate 21 of level, dividing plate 21 is provided with at least two above, can be many woofers arranged side by side 22, dividing plate 21 upper bottom portion are provided with at least two, can be many with woofer Shang Xia 22 symmetrical reverse parallel connection and quantity identical double woofer 27, it is identical with woofer 22 electric properties but act as supercharging.
Dividing plate 21 is divided into upper box and lower box by woofer 2, on the sidewall of upper box, be provided with compared with low-and high-frequency resonator 23, the corresponding sidewall of lower box is provided with lower low-frequency resonator 24, compared with low-and high-frequency resonator 23 and low-frequency resonator 24, be positioned on same longitudinal axis, thereby dividing plate 21 is divided into higher-frequency woofer 25 by woofer 2 and compared with low frequency woofer 26.
At woofer 2, be provided with compared with low-and high-frequency resonator 23 and be connected pressure regulating chamber 1 with the outside, cross section of lower low-frequency resonator 24, thereby connect into an acoustic resonance path with pressure regulating chamber 1 respectively compared with low-and high-frequency resonator 23 and the outer cross section of lower low-frequency resonator 24.Pressure regulating chamber 1 with compared with being respectively equipped with damping hole 11 on low-and high-frequency resonator 23 two sidewalls adjacent with lower low-frequency resonator 24, on damping hole 11, have a plurality of, and bilateral symmetry setting.In pressure regulating chamber 1, be also provided with acoustic(al)absorbent 12, acoustic(al)absorbent 12 is attached to the pressure regulating chamber corresponding with resonator 1 chamber wall.
The present embodiment is to take the basic acoustic construction of embodiment 1 as basis, a kind of mode from embodiment 2 change application, on dividing plate 21 two (comprising two) above woofers 22 of lower device with more than two (comprising two), double many woofers 22 that symmetrical reverse is in parallel such as woofer 27, make dividing plate 21 up and down many symmetrical loud speakers form connatural push-pull type motion simultaneously, thus under the vibration area prerequisite identical with monomer, make oscillating mass change multiplication with loud speaker plural number, and then make speaker drive energy also by loud speaker plural number, change multiplication, form the logical woofer of complex push-pull type band.
Embodiment 5:
With reference to Fig. 6, band general formula woofer described in the utility model, remain and take embodiment 1 as basic acoustic construction, and change application and the raw logical woofer of a kind of march-past band based on this, it comprises a woofer 2, in woofer 2, be provided with the first dividing plate 28 and the second partition 29 of level, the first dividing plate 28 is located at the top of second partition 29, thereby it is upper box that woofer 2 is divided into three spaces, lower box and middle casing, the first dividing plate 28 tops and second partition 29 bottoms are respectively provided with upper and lower two symmetrical woofers 22, on the sidewall of upper box and lower box, be respectively provided with the resonator 23 frequently of fighting it out, the corresponding sidewall of middle casing is provided with more range low frequency resonator 30, compared with low-and high-frequency resonator 23 and more range low frequency resonator 30 be positioned on same longitudinal axis, the first dividing plate 28 and second partition 29 are divided into two compared with low-and high-frequency woofer 25 and a low frequency woofer 31 by woofer 2.Wherein, more range low frequency resonator 30 is lower with respect to the frequency band resonance compared with low-and high-frequency resonator 23 and embodiment 1,2,3,4 lower low-frequency resonator 24, thereby is called more range low frequency resonator; Equally, low frequency woofer 31 is lower with respect to the frequency band resonance compared with low-and high-frequency woofer 25 and embodiment 1,2,3,4 low frequency woofers 26, thereby is called lower low frequency woofer.
Woofer 2 be provided with compared with low-and high-frequency resonator 23 and more the cross section outside of range low frequency resonator 30 connect pressure regulating chamber 1, thereby compared with low-and high-frequency resonator 23 and the outer cross section of range low frequency resonator 30 connect into an acoustic resonance path with pressure regulating chamber 1 respectively.Pressure regulating chamber 1 with compared with on low-and high-frequency resonator 23 and two sidewalls that more range low frequency resonator 30 is adjacent, be respectively equipped with damping hole 11, on damping hole 11, have a plurality of, and bilateral symmetry setting.In pressure regulating chamber 1, be also provided with acoustic(al)absorbent 12, acoustic(al)absorbent 12 is attached to the pressure regulating chamber corresponding with resonator 1 chamber wall.
The present embodiment is on embodiment 1 architecture basics, comprehensive embodiment 2, make to increase the change application mode of a low frequency woofer 31, in utilization, the woofer 22 of lower device is made reverse parallel connection, make it to form push-pull type motion, and between add and put one by the audio amplifier in centre position and low frequency woofer 31 that more range low frequency resonator 30 forms, make the two sides of its diaphragm of loudspeaker all produce air driven effect, so, compared with embodiment 2 its air driven areas, will exceed more than 1 times, it also improves more than 1 times compared with the efficiency of embodiment 2; Because it is positioned at middle audio amplifier space by upper and lower two speaker drive, large more than 1 times compared with the air driven energy of embodiment 2, just give the more low-frequency minimum design of range low frequency resonator 30 condition of larger displacement is downwards provided, thereby the present embodiment is had compared with embodiment 2 low frequencies, extended lower performance.
The present embodiment is distinguished array in the two ends up and down of low frequency woofer 31 by two identical low frequency woofers of performance, and the function of shared pressure regulating chamber 1, forms the logical woofer of march-past band.
Embodiment 6:
With reference to Fig. 7, the structure of embodiment 5 of take is basis, under the substantially constant prerequisite of its structure, the woofer 22 of device on the first dividing plate 28 and second partition 29 is made to multiple and increase processing, being applied on low frequency efficiency of embodiment 5 can be significantly improved, also with this, form march-past complex loaded ribbon general formula woofer.
Band general formula audio amplifier sounding is mainly resonatron, and the frequency of resonator is exactly audio amplifier frequency.
Wherein, described in above-mentioned four embodiment:
The lowest resonance frequency of woofer 22 is: 30Hz ~ 70Hz
Compared with the frequency range of low-and high-frequency resonator 23, be: 80Hz ~ 150Hz
The frequency range of lower low-frequency resonator 24 is: 30Hz ~ 80Hz
More the frequency range of range low frequency resonator 30 is: 10Hz ~ 30Hz
With reference to Fig. 8, the monomer-type band general formula woofer of take is example, demonstrate mixing enlarging function of the present utility model, wherein, the acoustic wave segment of woofer 22 vibration produces resonance or conduction via high-frequency resonator 23 and range low frequency resonator 24 and enters Multifunction pressure storehouse 1 and produce again resonance to amplify after vibrational energy by damping hole 11 to external radiation with the Air Coupling of this pressure regulating chamber 1 again.
With reference to Fig. 9, the monomer-type band general formula woofer of take is example, demonstrate filter function of the present utility model, wherein, the component frequency of woofer 22 vibration especially frequency more than 150Hz after high-frequency bass box 25 and low frequency bass box 26 filter, also have component frequency response to leak into Multifunction pressure storehouse 1 by upper frequency resonator 23 and lower frequency resonator 24, and the sound wave that leaks into Multifunction pressure storehouse 1 part is by pressure regulating chamber filtering again, thereby make the more existing band general formula of low-frequency component ratio audio amplifier larger.
Band general formula woofer in above embodiment, above all embodiment, all can be by adjusting the total area of damping hole 11 or by adjusting the volume of acoustic(al)absorbent 12, adjusting damping and the Q value of the utility model audio amplifier.Wherein, the total area of damping hole 11 is larger, and the damping value of audio amplifier is less, and the viscosity of Air Flow is fewer, and impulse response transient state is faster; Otherwise damping value is larger, the viscosity of Air Flow is more, and impulse response transient state is slower; The volume of acoustic(al)absorbent 12 is larger, and the Q value of audio amplifier is larger, and the viscosity of Air Flow is larger, stronger to loud speaker counter power; Otherwise Q value is less, the viscosity of Air Flow is less, more weak to loud speaker counter power; Make full use of the adjustable physical condition of the utility model damping and Q value, the proportioning of damping and Q value can be set to an integrated value through optimizing, so can make whole low frequency channel, comprise the fully resonance such as loud speaker, resonator, audio amplifier, to improving performance and the quality of bass box, be all beneficial to.
The utility model is mainly at multi-functional acoustics pressure regulating chamber of band general formula woofer opening part (cross section outside resonator) load, pressure regulating chamber is provided with some damping holes or device has acoustic(al)absorbent, form non-complete enclosure space, be equivalent to be provided with between the free space outside audio amplifier low-frequency resonator and casing cushion space or a medium-space that air is mutual, and utilize the air fluid mechanics special status of its buffering or intermediary, by self space being carried out to the variation adjustment of damping characteristic or Q value characteristic, integrate case chamber, sound coupled relation between tube chamber and free space, thereby form the adjustable band general formula woofer acoustic construction of a kind of novel bass tone color, form the current low frequency audio amplifier treatment technology with general formula woofer that is different from self acoustic characteristic.
The basic principle of application of the present utility model:
1, compared with low-and high-frequency audio amplifier and low frequency audio amplifier (comprising low frequency audio amplifier), be one and unite two into one the woofer of (even closing three is);
2, compared with low-and high-frequency audio amplifier and low frequency audio amplifier (comprising low frequency audio amplifier), use loud speaker that electric property is identical as resonant drive;
3, for the speaker unit of resonant drive at the dividing plate that will separate compared with low-and high-frequency audio amplifier and low frequency audio amplifier (comprising low frequency audio amplifier);
4, compared with low-and high-frequency audio amplifier and the different resonant frequency range of low frequency audio amplifier (comprising low frequency audio amplifier), be to be formed by the difference of different separately resonant frequency point values and tank-volumes and resonator catheter length (comprising diameter) ratio;
One section of relatively high frequency response of 5, sending by resonatron and pressure regulating chamber coupling compared with low-and high-frequency audio amplifier is mixed into the LF-response of a section wider compared with other acoustic construction audio amplifier low-frequency ranges with one section of relatively low frequency response that low frequency audio amplifier (comprising low frequency audio amplifier) sends by resonatron and pressure regulating chamber coupling at pressure regulating chamber;
6, dividing plate can install a woofer unit, two woofer unit, 3 woofer unit, 4 ... and even N woofer unit;
7, during every device even number loudspeaker unit, must carry out reverse parallel connection processing, make the direction of motion of vibrating diaphragm consistent;
8, during every device odd number loudspeaker unit, must carry out forward parallel processing, make the signal time difference of loudspeaker unit vibration consistent.
The key of the utility model technology is that the pressure regulating chamber of institute's load carries out damping adjustment and the adjustment of Q value:
First, between the resonator of audio amplifier (being also referred to as phase-reversing tube, sound guide tube, conduit) and loud speaker, there is air-flow antagonism vibration relation.Must be through narrow and small resonator opening when the diaphragm of loudspeaker moves the outside propelling movement of air or inside inspiration air-flow, when the air-flow pressure of its propelling movement or inspiration reaches certain intensity, narrow and small resonator opening is because of self scale of construction restriction, smooth propelling movement or the inspiration of air-flow have been suppressed, caused the delay of some frequency vibration ripple air-flow of loud speaker at resonator opening part, when this postpones just in time to cause loudspeaker vibration airflow direction contrary with resonator airflow direction (as while loud speaker pushes the outside and resonator inspiration air-flow of air-flow inwards or on the contrary), the air column of the resonator vibration sounding that will be excited, resonator aperture area more longer its of pipe with small pipe diameter loudspeaker vibration is pushed or the air damping of inspiration just larger, the reverse Frequency point of the air-flow that produces just lower, the frequency of vibration sounding of being excited is also just lower.Conventionally, with the audio amplifier beyond general formula bass box, as only having a Frequency point generation air-flow antagonism, inverted phase type, labyrinth type, duct type etc. vibrate relation, that is exactly the lowest resonance frequency of loud speaker, because in similar acoustic construction audio amplifier, loud speaker only has this frequency to produce peak swing, cause larger atmospheric pressure, force resonator air column because of air-flow reversal of vibrations sounding.So, every audio amplifier that utilizes loud speaker lowest resonance frequency to force resonator sounding, the peak swing when air acting in opposition of resonator can suppress loud speaker lowest resonance frequency, is conducive to the buffering of loud speaker change in resistance; And make it have some Frequency points but not the air-flow antagonism vibration relation of some Frequency points with the special construction of general formula bass box, be almost that all Frequency points between lower frequency to upper frequency all produce this air-flow antagonism vibration relation, also can say that band general formula bass box is close to completely by this relation to allow resonator sounding.Other audio amplifiers are the resonance of a Frequency point, are the resonance of a frequency band with general formula audio amplifier.In this principle, multi-functional acoustics pressure regulating chamber of load, when pressure regulating chamber self increases damping, will increase the weight of the damping of resonator or increase the Q value of whole acoustic path, also strengthened the air viscosity of whole acoustic path simultaneously, force resonator to produce the reverse Frequency point of air-flow and be shifted downwards, the application of this principle makes the utility model lower compared with the frequency response of normal tape general formula woofer; Because this Multifunction pressure storehouse is also a resonance space, its low-frequency resonant entire area is greater than the low-frequency resonant area of normal tape general formula woofer, so the efficiency that its bass is processed wants high compared with normal tape general formula woofer; Again because pressure regulating chamber has played filter action again outward at resonator, so its low frequency tonequality is purer compared with normal tape general formula woofer.
Secondly, the utility model is on the one hand from variations such as mixing function, filter function, voltage regulation function and loudspeaker monomer model application, push-pull mode application, complex model application, the application of complex push-pull mode, apportion model applications, accuracy and the flexibility ratio of not only audio amplifier low frequency being processed to acoustical behavior and quality thereof increase, and under requiring, different designs make low frequency processing and control device have more flexibility, especially compared with small box low frequency, processing, more currently with general formula woofer, having more the application advantage that bass efficiency improves or volume dwindles; Because it can adjust its air pressure and flow velocity neatly, the less audio amplifier of design volume under equal low frequency performance standard, can save material usage, further saves production cost and social resources on the other hand.Therefore, to audio amplifier frequency acoustic, technical finesse has the promotion meaning of practical value and electroacoustic techniques development to the utility model.
The above is preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications are also considered as protection range of the present utility model.
Claims (9)
1. be with general formula woofer for one kind, it is characterized in that: comprise woofer (2), in described woofer (2), there is at least one horizontally disposed dividing plate (21), described dividing plate (21) is provided with at least one woofer (22), woofer (2) tank wall of described dividing plate (21) top and below is provided with low-frequency resonator, described woofer (2) is divided into the low frequency woofer of top and below;
Described woofer (2) is provided with pressure regulating chamber (1), and the outer cross section of described low-frequency resonator connects into an acoustic resonance path with described pressure regulating chamber (1) respectively.
2. be with according to claim 1 general formula woofer, it is characterized in that: woofer (2) tank wall of described dividing plate (21) top is provided with compared with low-and high-frequency resonator (23), woofer (2) casing of dividing plate (21) below is provided with lower low-frequency resonator (24), by described woofer (2) be divided into top compared with the low frequency woofer (26) of low-and high-frequency woofer (25) and below.
3. according to described in claim 1 any one, be with general formula woofer, it is characterized in that: in described pressure regulating chamber (1), be provided with acoustic(al)absorbent (12), described pressure regulating chamber (1) is provided with damping hole (11).
4. be with according to claim 3 general formula woofer, it is characterized in that: described damping hole (11) has a plurality of, horizontal symmetrical is arranged on described pressure regulating chamber (1).
5. according to described in claim 1 ~ 3 any one, be with general formula woofer, it is characterized in that: described dividing plate quantity is one, a woofer (22) is set on dividing plate (21), compositing monomer formula band leads to woofer.
6. according to described in claim 1 ~ 3 any one, be with general formula woofer, it is characterized in that: described dividing plate quantity is one, upper equidirectional at least two woofers (22) that are set up in parallel of described dividing plate (21), form the logical woofer of complex formula band.
7. according to described in claim 1 ~ 3 any one, be with general formula woofer, it is characterized in that: described dividing plate quantity is one, described dividing plate (21) respectively arranges the woofer of a symmetrical reverse parallel connection up and down, forms the logical woofer of push-pull type band.
8. according to described in claim 1 ~ 3 any one, be with general formula woofer, it is characterized in that: described dividing plate quantity is one, the woofer of described dividing plate (21) at least two pairs of upper and lower symmetrical reverse parallel connections setting up and down, forms the logical woofer of complex push-pull type band.
9. according to described in claim 1 ~ 3 any one, be with general formula woofer, it is characterized in that: the second partition (29) that is provided with first dividing plate (28) of level in described woofer (2) and is positioned at the first dividing plate (28) below, between described the first dividing plate (28) and second partition (29), be provided with low frequency woofer (31), the tank wall of low frequency woofer (31) is provided with more range low frequency resonator (30), described the first dividing plate (28) top and described second partition (29) bottom are respectively provided with laterally zygomorphic one or many woofers (22), form the logical woofer of march-past band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420078198.0U CN203761568U (en) | 2014-02-24 | 2014-02-24 | Band-pass type low pitch sound box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420078198.0U CN203761568U (en) | 2014-02-24 | 2014-02-24 | Band-pass type low pitch sound box |
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| CN203761568U true CN203761568U (en) | 2014-08-06 |
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| CN201420078198.0U Expired - Fee Related CN203761568U (en) | 2014-02-24 | 2014-02-24 | Band-pass type low pitch sound box |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103826183A (en) * | 2014-02-24 | 2014-05-28 | 东莞凤合凰电声科技有限公司 | Band-pass type bass loudspeaker box and adjusting method thereof |
| CN108932939A (en) * | 2017-05-26 | 2018-12-04 | 南京大学 | It is a kind of to have the slim sound absorption structure and its design method for adjusting noise for low frequency |
-
2014
- 2014-02-24 CN CN201420078198.0U patent/CN203761568U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103826183A (en) * | 2014-02-24 | 2014-05-28 | 东莞凤合凰电声科技有限公司 | Band-pass type bass loudspeaker box and adjusting method thereof |
| CN103826183B (en) * | 2014-02-24 | 2019-07-26 | 东莞凤合凰电声科技有限公司 | A kind of band general formula woofer and its method of adjustment |
| CN108932939A (en) * | 2017-05-26 | 2018-12-04 | 南京大学 | It is a kind of to have the slim sound absorption structure and its design method for adjusting noise for low frequency |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20200224 |