CN103139687B - Based on the audio frequency special efficacy device of parametric acoustic array acoustic beam reflection - Google Patents
Based on the audio frequency special efficacy device of parametric acoustic array acoustic beam reflection Download PDFInfo
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- CN103139687B CN103139687B CN201210576384.2A CN201210576384A CN103139687B CN 103139687 B CN103139687 B CN 103139687B CN 201210576384 A CN201210576384 A CN 201210576384A CN 103139687 B CN103139687 B CN 103139687B
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Abstract
Based on an audio frequency special efficacy device for parametric acoustic array acoustic beam reflection, be made up of sound source, parametric acoustic array loudspeaker array, beam of sound reflector, beam of sound reflector moving component and beam of sound reflector control parts of motion.The distinctive local propagation of high directivity audio sound wave beam that the present invention utilizes parametric acoustic array to produce and reflection characteristic, realize three-dimensional multi-beam dynamic interleaving audio frequency special efficacy, can be audience and bring a kind of brand-new audio frequency special efficacy to experience.
Description
Technical field
A kind of audio frequency special efficacy device, the reflection characteristic particularly relating to a kind of high directivity acoustic beam utilizing parametric acoustic array to produce realizes the device of stereo audio special efficacy.
Background technology
Conventional audio special efficacy realizes audio frequency special efficacy mainly through sound effect processing circuit or Digital Signal Processing means.Sound effect processing circuit is adopted mainly to realize audio frequency special efficacy by hardware means, as the stereo surrounding effect to the less demanding occasion of audio frequency special efficacy such as computer, TV and the narrow and small environment of listening volume can be realized by two channel stereo treatment circuits, adopt multichannel sound effect processing circuit then can realize more natural, that fidelity is higher, tonequality is better, surrounding effect is stronger surround sound effect.Along with the development of Digital Signal Processing, audio frequency special effect processing technology is developed rapidly, the audio frequency special efficacy making some adopt hardware circuits to be difficult to realize can be easily implemented by Digital Signal Processing means, as volume adjustment (as be fade-in fade-out, equilibrium of left and right acoustic channels volume, envelope adjustment etc.), frequency equilibrium process, reverberation/echo/delay disposal, chorus process, dynamic process (as compression, restriction, door etc.), distortion process, noise processed, 3D audio, rising-falling tone and time-stretching etc.
Although conventional audio special efficacy realization rate can produce multiple audio frequency special efficacy, in essence, no matter be by hardware circuit, or the audio signal that Digital Signal Processing means produce finally still must be launched in space through conventional loudspeakers.Because the sound wave adopting conventional loudspeakers to produce is generally isotropic, do not have strong directive property, more can not produce high directivity audio sound wave beam, therefore conventional audio special efficacy realization rate cannot build the audio frequency special efficacy of multi-beam dynamic interleaving in three dimensions.
Parametric acoustic array technology in air is the audio frequency sound directional technology occurred in recent years.Utilize parametric acoustic array can produce high directivity audio sound wave beam.The audio frequency sound harness that parametric acoustic array produces has exclusive characteristic, be mainly reflected in two aspects: one, local propagation characteristic: namely beam of sound is only propagated in local space, in this communication space, audience can hear sound, and outside this communication space region, audience then can't hear and maybe can only hear very faint sound; Two, unique reflection characteristic: after audio sound wave beam runs into barrier, have and be similar to the reflection characteristic that light runs into minute surface, after audience hears the sound after reflection, can produce sound wave is psychologically the special impression coming from last reflecting surface.The local propagation characteristic of the audio sound wave beam that parametric acoustic array produces creates condition with unique sound reflection characteristics for realizing multi-beam dynamic interleaving audio frequency special efficacy in three dimensions.
Summary of the invention
The object of this invention is to provide a kind of audio frequency special efficacy device based on parametric acoustic array reflection characteristic, to solve the audio frequency special efficacy problem that current conventional audio special efficacy means cannot build multi-beam dynamic interleaving in three dimensions.
The object of the invention is to be realized by the following technical programs: a kind of audio frequency special efficacy device based on parametric acoustic array acoustic beam reflection characteristic, comprising:
Sound source, in order to produce audio signal to be played, can adopt the general sound sources such as MP3, computer, MP4, broadcast receiver, recorder, and its audio signal produced is input in parametric acoustic array loudspeaker array by audio signal wire.
Parametric acoustic array loudspeaker array, in order to produce high directivity audio sound wave beam, in array, each loud speaker all can send a high directivity audio sound wave beam independently, after these beam of sounds propagate a segment distance in space, beam of sound reflector reflects; Different according to beam of sound reflector position and mode, adopt different parametric acoustic array loud speakers to structure the formation form, its principle of structuring the formation ensures that each beam of sound can aim at the beam of sound reflector corresponding with it to carry out usable reflection.
Beam of sound reflector, in order to reflected sound wave beam, its surface is plane or curved surface, or the combining form of the two; The effective reflecting surface of dynamic conditioning beam of sound is carried out by the revolution of beam of sound reflector and translational motion; The shape of reflected sound wave beam is adjusted by the shape of effective reflecting surface and the change of attitude; The reflection direction of beam of sound is adjusted by the normal of effective reflecting surface and the change of beam of sound centerlines.
Beam of sound reflector motion driver part, mainly comprise gyration driver part and translational motion driver part, gyration driver part is used for making beam of sound reflector produce gyration, and translational motion driver part is used for making beam of sound reflector produce translation, the two can use simultaneously, also can independently use.
Beam of sound reflector control parts of motion, in order to control acoustic reflection body motion driver part, drives beam of sound reflector to produce motion then; By carrying out rhythm, the isoparametric analysis of intensity to the audio signal play, produce the controling parameters such as beam of sound reflector rotation corresponding with it, translation and start-stop, the change of the spatial of beam of sound is changed with audio signal and is mapped.
The intertexture that the high directivity audio sound wave beam that the present invention utilizes parametric acoustic array the to produce characteristic that only regional area is propagated in space realizes Multi-audio-frequency beam of sound in three dimensions is propagated, utilize the distinctive reflection characteristic of this audio sound wave beam, changed reflective shape and the reflection angle of beam of sound by the motion of beam of sound reflector, thus the dynamic interleaving realizing Multi-audio-frequency beam of sound in three dimensions propagates audio frequency special efficacy.This audio frequency special efficacy is the three-dimensional space audio frequency special efficacy that the first utilizes directional audio beam of sound to realize, with conventional audio special efficacy, there is in implementation the difference of matter, the music, the voice that can be applicable to novelty experience occasion, as singing-hall, dance hall, exhibition center, voice exhibition room etc.The audio frequency sound harness produced due to parametric acoustic array has that directive property is strong, the advantage of concentration of energy, and make it to propagate great distances, this lays a good foundation for producing three-dimensional multi-beam dynamic interleaving audio frequency special efficacy in large space.Meanwhile, in actual applications, the place such as indoor top, wall, floor produces multiple reflections, produces the effect that in space, audio sound wave beam repeatedly passes through, for audience brings brand-new audio frequency special efficacy to experience.
Accompanying drawing explanation
Fig. 1 shows the audio frequency special efficacy device general structure based on the reflection of parametric acoustic array acoustic beam.
Fig. 2 shows and to structure the formation form according to the concrete layout adjustment parametric acoustic array loudspeaker array of beam of sound reflector.
Fig. 3 shows the impact on reflective sound wave harness shape and angle of reflection when beam of sound reflector adopts different surfaces.
Fig. 4 shows the motion of beam of sound reflector to the impact of reflected sound wave beam.
Fig. 5 shows a typical beam of sound reflector motion control flow process.
Embodiment
Fig. 1 shows the audio frequency special efficacy device hardware schematic structure based on the reflection of parametric acoustic array acoustic beam.Audio frequency special efficacy device based on the reflection of parametric acoustic array acoustic beam is made up of sound source 1, parametric acoustic array loudspeaker array 2, beam of sound reflector 3, beam of sound reflector motion driver part 4 harmony beams reflected body control parts of motion 5.Sound source 1 is the general sound sources such as MP3, computer, MP4, broadcast receiver, recorder, and its audio signal produced is as the input signal of parametric acoustic array loudspeaker array 2.Parametric acoustic array loudspeaker array 2 can be made up of single or multiple parametric acoustic array loud speaker, and each parametric acoustic array loud speaker produces the audio sound wave beam that a high directivity is propagated.Adjust installation site and the direction of each parametric acoustic array loud speaker, the audio sound wave beam enabling it produce effectively arrives on the reflecting surface of beam of sound reflector 3 of its correspondence.The reflecting surface of beam of sound reflector 3 can be plane, curved surface or the mixed form of the two, and the projected area of beam of sound on this reflecting surface is called effective reflecting surface.The shape of this effective reflecting surface determines the shape of reflected beam, and the angle of its normal and the intrafascicular line of incident acoustic wave determines the direction of propagation of reflected sound wave beam.When designing the reflecting surface of beam of sound reflector 3, it should be made to be diversity change profile at circumferencial direction and curved surface axially, even if incident sound wave beam 6 has same shape, also change the shape of effective reflecting surface by the rotation of beam of sound reflector 3, translation, thus reach and dynamically change the shape of reflected sound wave beam 7 and the object of the direction of propagation (reflection direction).The rotation of beam of sound reflector 3 and translation drive realization by beam of sound reflector motion driver part 4, beam of sound reflector motion driver part 4 mainly comprises gyration driver part and translational motion driver part, gyration driver part is used for making beam of sound reflector produce gyration, and translational motion driver part is used for making beam of sound reflector produce translation, the two can use simultaneously, also can independently use.Acoustic reflection body motion driver part 4 controls by beam of sound reflector control parts of motion 5.Beam of sound reflector control parts of motion 5 is carried out behavioral characteristics by the audio signal sent sound source 1 and is extracted and analyze, as to signal rhythm, the isoparametric extraction of intensity and analysis, calculate the motion control parameter of each beam of sound reflector 3, thus by controlling beam of sound reflector motion driver part 4, make that each beam of sound reflector 3 all correspondingly turns round according to the situation of change of audio signal, translational motion, thus dynamically change shape and the direction of propagation of each beam of sound, produce multi-beam dynamic interleaving audio frequency special efficacy in three dimensions.
Fig. 2 shows and adjusts parametric acoustic array loudspeaker array according to the concrete position of beam of sound reflector and mode and to structure the formation form.Fig. 2 (a) shows beam of sound reflector 3 when being installed in a plane, and parametric acoustic array loudspeaker array is arranged to the situation of a planar array.Fig. 2 (b) shows beam of sound reflector and disperses distribution in space, and each self-corresponding beam of sound reflector aimed at respectively by each parametric acoustic array loud speaker, forms the situation of a solid array in space.
Fig. 3 shows the impact on reflective sound wave harness shape and angle of reflection when beam of sound reflector adopts different surfaces.Fig. 3 (a) shows the situation that audio sound wave beam reflects in the plane, and angle of reflection equals incidence angle substantially, and the beam of sound after reflection does not have large change in shape.Fig. 3 (b) shows the reflection case of audio sound wave beam on convex surface, and the beam of sound after reflection will become to be dispersed, and as a cylindrical acoustic wave beam reflects on sphere, the beam of sound after its reflection will be coniform in one.Fig. 3 (c) shows the beam of sound reflection case in plane and curved surface junction, now reflected sound wave beam will be divided into two parts, the beam of sound shape reflected in the plane remains unchanged substantially, and the beam of sound shape reflected on curved surface will change (change of reflected sound wave beam is dispersed on convex surface, and reflected sound wave beam becomes convergence on concave curved surface).If incident sound wave beam 6 is tapered, reflected sound wave beam is also in similar Changing Pattern.The reflection characteristic that beam of sound is this is similar to light in plane or curved surface is for utilizing the difform effective reflecting surface of beam of sound reflector 3 to obtain difform reflected sound wave beam and the direction of propagation creates condition.
Fig. 4 shows the motion of beam of sound reflector to the impact of reflected sound wave beam.Beam of sound reflector 3 is designed with different curved surfaces in axially different position, even if at same axial location, it is also designed to change curved surface at curved surface circumferentially, therefore the effective reflecting surface shape of incident sound wave beam be can be changed by the revolution of beam of sound reflector 3, translation (comprising x, y, z three directions) motion, thus shape and the direction of propagation of reflected sound wave beam dynamically changed.
Fig. 5 shows a typical beam of sound reflector motion control flow process.Beam of sound reflector control parts of motion is connected by holding wire with sound source, and read this audio signal when sound source playing audio signal, then the parameter such as analyzing audio signal rhythm, intensity, rotation, translation controling parameters is generated by calculating, then these controling parameters are exported to beam of sound reflector motion driver part, beam of sound reflector is mapped with audio rhythm, intensity (generally adopting proportional relationship), thus realizes multi-beam dynamic interleaving audio frequency special efficacy in three dimensions.This motion control flow process automatically terminates at the end of audio frequency is play.
Claims (5)
1., based on an audio frequency special efficacy device for parametric acoustic array acoustic beam reflection, comprising:
Sound source, in order to produce audio signal to be played, adopts MP3, computer, MP4, broadcast receiver, recorder or other general sound source, and its audio signal produced is input in parametric acoustic array loudspeaker array by audio signal wire;
Parametric acoustic array loudspeaker array, in order to produce high directivity audio sound wave beam, in array, each loud speaker sends a high directivity audio sound wave beam all independently;
Beam of sound reflector, in order to reflected acoustic beam of sound, makes the audio frequency sound harness shape of reflection and angle of reflection change by its motion;
Beam of sound reflector motion driver part, comprise gyration driver part and translational motion driver part, gyration driver part is used for making beam of sound reflector produce gyration, and translational motion driver part is used for making beam of sound reflector produce translational motion;
Beam of sound reflector control parts of motion, in order to control beam of sound reflector motion driver part, drives beam of sound reflector to produce motion then.
2. audio frequency special efficacy device according to claim 1, is characterized in that: described parametric acoustic array loudspeaker array can be made up of single or multiple parametric array loudspeaker; Its form of structuring the formation must ensure that each beam of sound can aim at the beam of sound reflector corresponding with it to carry out usable reflection; Parametric acoustic array loudspeaker array form of structuring the formation is determined according to the concrete layout of beam of sound reflector, if all beam of sound reflectors are in a plane, parametric acoustic array loudspeaker array is arranged to a planar array, if beam of sound reflector disperses distribution in space, then each parametric array loudspeaker must aim at each self-corresponding beam of sound reflector respectively, forms a solid array in space.
3. audio frequency special efficacy device according to claim 1, is characterized in that: described beam of sound reflector surface is plane, curved surface, or the assembly of plane and curved surface; The effective reflecting surface of dynamic conditioning beam of sound is carried out by the revolution of beam of sound reflector and translational motion; The shape of reflected sound wave beam is adjusted by the change of shape of effective reflecting surface; The direction of propagation of reflected sound wave beam is adjusted by the normal of effective reflecting surface and the change of beam of sound centerlines.
4. audio frequency special efficacy device according to claim 1, is characterized in that: described beam of sound reflector motion driver part can be made up of one of gyration driver part, translational motion driver part, also can be made up of the two simultaneously.
5. audio frequency special efficacy device according to claim 1, is characterized in that: described beam of sound reflector control parts of motion carries out the analysis of rhythm, intensity parameters to the audio signal play, to form the motion control parameter of acoustic reflection body; Under the effect of these motion control parameters, the velocity of rotation of beam of sound reflector, translational velocity and start-stop rhythm kinematic parameter and audio signal rhythm and intensity parameters corresponding relation in direct ratio, thus beam of sound propagation change is in space changed with audio signal be mapped.
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| CN111726731B (en) * | 2019-03-20 | 2022-03-18 | 比亚迪股份有限公司 | Vehicle, vehicle-mounted sound system, and sound field adjusting method and device |
| CN116744195B (en) * | 2023-08-10 | 2023-10-31 | 苏州清听声学科技有限公司 | Parametric array loudspeaker and directional deflection method thereof |
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| CN1942020A (en) * | 2005-09-27 | 2007-04-04 | 精工爱普生株式会社 | Electrostatic ultrasonic transducer and design method thereof, and ultrasonic speaker |
| CN202587350U (en) * | 2012-05-07 | 2012-12-05 | 潘贤昆 | Sound equipment sound intensity intersection system |
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| CN1942020A (en) * | 2005-09-27 | 2007-04-04 | 精工爱普生株式会社 | Electrostatic ultrasonic transducer and design method thereof, and ultrasonic speaker |
| CN202587350U (en) * | 2012-05-07 | 2012-12-05 | 潘贤昆 | Sound equipment sound intensity intersection system |
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