CN103139687A - Sound frequency special effect editor based on acoustic parametric array acoustic beam reflection - Google Patents
Sound frequency special effect editor based on acoustic parametric array acoustic beam reflection Download PDFInfo
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Abstract
A sound frequency special effect editor based on acoustic parametric array acoustic beam reflection is composed of a sound source, an acoustic parametric array speaker array, an acoustic beam reflection body, an acoustic beam reflection body moving component and an acoustic beam reflection body motion control component. According to the sound frequency special effect editor based on the acoustic parametric array acoustic beam reflection, local transmission and reflection characteristics of high directivity acoustic beams generated by an acoustic parametric array are utilized, three dimensional multibeam dynamic mixed audio effects are achieved, and completely novel sound frequency special effect experience can be brought for the audience.
Description
Technical field
A kind of audio frequency special efficacy device relates in particular to the device that a kind of reflection characteristic of utilizing the high directivity acoustic beam that parametric acoustic array produces realizes the stereo audio special efficacy.
Background technology
The conventional audio special efficacy mainly realizes the audio frequency special efficacy by sound effect processing circuit or Digital Signal Processing means.Adopting sound effect processing circuit is mainly to realize the audio frequency special efficacy by hardware means, as realizing computer, TV and audition narrow space environment etc. by two channel stereo treatment circuits to the stereo surrounding effect of the less demanding occasion of audio frequency special efficacy, adopt the multichannel sound effect processing circuit can realize the surround sound effect more natural, that fidelity is higher, tonequality is better, surrounding effect is stronger.Development along with Digital Signal Processing, audio frequency special effect processing technology has obtained fast development, the audio frequency special efficacy that makes some adopt hardware circuits to be difficult to realize can be realized easily by the 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 processings, reverberation/echo/delay disposal, chorus process, dynamic process (as compression, restriction, etc.), distortion processing, noise processed, 3D audio, rising-falling tone and time stretching etc.
Although the conventional audio special efficacy realizes means and can produce multiple audio frequency special efficacy, in essence, no matter be by hardware circuit, or the audio signal that produces of Digital Signal Processing means is final or must launch in the space through conventional loudspeakers.Because the sound wave that adopts conventional loudspeakers to produce is generally isotropic, there is no strong directive property, more can not produce high directivity audio sound wave beam, so the conventional audio special efficacy realizes that means can't build the audio frequency special efficacy of multi-beam dynamic interleaving in three dimensions.
Airborne parametric acoustic array technology is the audio frequency sound directional technology that occurs in recent years.Utilize parametric acoustic array can produce high directivity audio sound wave beam.The audio sound wave beam 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, the audience can hear sound in this communication space, and the audience can't hear maybe and can only hear very faint sound outside this communication space zone; Two, unique reflection characteristic: after the audio sound wave beam runs into barrier, have and be similar to the reflection characteristic that light runs into minute surface, after the audience heard sound after reflection, can produce sound wave psychologically was the special impression that comes from last reflecting surface.The local propagation characteristic of the audio sound wave beam that parametric acoustic array produces has been created condition with unique sound reflection characteristics for realizing the interior multi-beam dynamic interleaving audio frequency special efficacy of three dimensions.
Summary of the invention
The purpose of this invention is to provide a kind of audio frequency special efficacy device based on the parametric acoustic array reflection characteristic, the audio frequency special efficacy problem that can't build multi-beam dynamic interleaving in three dimensions to solve present conventional audio special efficacy means.
The objective 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 comprises:
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 the audio signal of its generation is input in the parametric acoustic array loudspeaker array by audio signal wire.
The 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, and these beam of sounds reflect on the beam of sound reflector propagate a segment distance in the space after; Different according to beam of sound reflector position and mode are adopted the different parametric acoustic array loud speakers form of structuring the formation, and its principle of structuring the formation is to guarantee that each beam of sound can aim at the beam of sound reflector corresponding with it to carry out usable reflection.
The beam of sound reflector, in order to the reflected sound wave beam, its surface is plane or curved surface, or combining form both; The effective reflecting surface of dynamically adjusting beam of sound by revolution and the translational motion of beam of sound reflector; The shape of reflected sound wave beam is adjusted in shape by effective reflecting surface and the variation of attitude; The reflection direction of beam of sound is adjusted in normal by effective reflecting surface and the variation of beam of sound center line angle.
Beam of sound reflector motion driver part, mainly comprise gyration driver part and translational motion driver part, the gyration driver part is used for making the beam of sound reflector to produce gyration, and the translational motion driver part is used for making the beam of sound reflector to produce translation, both 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, then drives the beam of sound reflector and produces motion; By in progress audio signal being carried out rhythm, the isoparametric analysis of intensity, parameter is controlled in the generation rotation of beam of sound reflector, translation and the start-stop etc. of correspondence with it, and the spatial variation of beam of sound and audio signal variation are mapped.
The present invention utilizes the high directivity audio sound wave beam characteristic that only regional area is propagated in the space of parametric acoustic array generation to realize the propagation that interweaves of Multi-audio-frequency beam of sound in three dimensions, utilize the distinctive reflection characteristic of this audio sound wave beam, change reflection shape and the reflection angle of beam of sound by the motion of beam of sound reflector, thereby the dynamic interleaving of realizing Multi-audio-frequency beam of sound in three dimensions is propagated the audio frequency special efficacy.This audio frequency special efficacy is the three-dimensional space audio frequency special efficacy that the first utilizes the directional audio beam of sound to realize, the difference that has matter with the conventional audio special efficacy on implementation, can be applicable to novel music, voice and experience occasion, as singing-hall, dance hall, exhibition center, voice exhibition room etc.The audio sound wave beam that produces due to parametric acoustic array has advantages of that directive property is strong, concentration of energy, makes it can propagate great distances, and this lays a good foundation for produce three-dimensional multi-beam dynamic interleaving audio frequency special efficacy in large space.Simultaneously, in actual applications, Multi reflection is located to produce in indoor top, wall, floor etc., produces the effect that in the space, the audio sound wave beam repeatedly passes through, and experiences for the audience brings brand-new audio frequency special efficacy.
Description of drawings
Fig. 1 shows the audio frequency special efficacy device general structure based on the reflection of parametric acoustic array acoustic beam.
Fig. 2 shows according to the concrete layout of beam of sound reflector and adjusts the parametric acoustic array loudspeaker array form of structuring the formation.
Fig. 3 shows the beam of sound reflector when adopting different surfaces on the impact of reflective sound wave harness shape and angle of reflection.
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 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 the audio signal of its generation is as the input signal of parametric acoustic array loudspeaker array 2.Parametric acoustic array loudspeaker array 2 can be comprised of single or multiple parametric acoustic array loud speakers, 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 of its generation can effectively be arrived on the reflecting surface of its corresponding beam of sound reflector 3.The reflecting surface of beam of sound reflector 3 can be plane, curved surface or mixed form both, and the projected area of beam of sound on this reflecting surface is called effective reflecting surface.The shape of this effective reflecting surface has determined the shape of reflected beam, and the angle of its normal and the intrafascicular line of incident acoustic wave has determined the direction of propagation of reflected sound wave beam.When designing the reflecting surface of beam of sound reflector 3, should make its curved surface on circumferencial direction reaches axially be the diversity change profile, even it is identical shaped that incident sound wave beam 6 has, also can be by the rotation of beam of sound reflector 3, the shape that translation changes effective reflecting surface, thus reach the shape of dynamic change reflected sound wave beam 7 and the purpose of the direction of propagation (reflection direction).The rotation of beam of sound reflector 3 and translation are driven by beam of sound reflector motion driver part 4 and realize, beam of sound reflector motion driver part 4 mainly comprises gyration driver part and translational motion driver part, the gyration driver part is used for making the beam of sound reflector to produce gyration, and the translational motion driver part is used for making the beam of sound reflector to produce translation, both can use simultaneously, also can independently use.Acoustic reflection body motion driver part 4 is controlled 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 that sound source 1 is sent 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, thereby by controlling beam of sound reflector motion driver part 4, make each beam of sound reflector 3 all correspondingly do revolution, translational motion according to the situation of change of audio signal, thereby 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 according to the concrete position of beam of sound reflector and mode and adjusts the parametric acoustic array loudspeaker array form of structuring the formation.When Fig. 2 (a) showed beam of sound reflector 3 and is installed in a plane, the parametric acoustic array loudspeaker array was arranged to the situation of a planar array.Fig. 2 (b) shows the beam of sound reflector to be disperseed to distribute in the space, and each parametric acoustic array loud speaker is aimed at respectively each self-corresponding beam of sound reflector, forms the situation of a solid array in the space.
Fig. 3 shows the beam of sound reflector when adopting different surfaces on the impact of reflective sound wave harness shape and angle of reflection.Fig. 3 (a) shows the situation that the audio sound wave beam reflects in the plane, and angle of reflection equals incidence angle substantially, and the beam of sound after reflection is not having large variation 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 and disperse, and reflects on sphere as a cylindrical acoustic wave beam, and the beam of sound after its reflection will be one coniform.Fig. 3 (c) shows the beam of sound reflection case in plane and curved surface junction, the reflected sound wave beam will be divided into two parts this moment, the beam of sound shape of reflection remains unchanged substantially in the plane, and will change in the beam of sound shape that reflects on curved surface (change of reflected sound wave beam is dispersed on convex surface, and the reflected sound wave beam becomes convergence on concave curved surface).If incident sound wave beam 6 is tapered, the reflected sound wave beam also is similar Changing Pattern.Beam of sound is this is similar to the reflection of light characteristic for utilizing the difform effective reflecting surface of beam of sound reflector 3 to obtain difform reflected sound wave beam and condition has been created in the direction of propagation on plane or curved surface.
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 different axial positions, even at same axial location, its curved surface on circumference also is designed to change curved surface, therefore can change the effective reflecting surface shape of incident sound wave beam, thereby dynamically change shape and the direction of propagation of reflected sound wave beam by revolution, translation (comprising x, y, three directions of the z) motion of beam of sound reflector 3.
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 the sound source playing audio signal, then parameters such as analyzing audio signal rhythm, intensity, by generating rotation, translation control parameter, then export these to beam of sound reflector motion driver part and control parameter, beam of sound reflector and audio rhythm, intensity are mapped (generally adopting proportional relationship), thereby realize multi-beam dynamic interleaving audio frequency special efficacy in three dimensions.This motion control flow process is play when finishing at audio frequency and is automatically finished.
Claims (5)
1. audio frequency special efficacy device based on parametric acoustic array acoustic beam reflection comprises:
Sound source in order to produce audio signal to be played, adopts the general sound sources such as MP3, computer, MP4, broadcast receiver, recorder, and the audio signal of its generation is input in the parametric acoustic array loudspeaker array by audio signal wire;
The parametric acoustic array loudspeaker array, in order to produce high directivity audio sound wave beam, in array, each loud speaker all sends a high directivity audio sound wave beam independently;
The beam of sound reflector in order to reflect the audio sound wave beam, changes audio frequency sound harness shape and the angle of reflection of reflection by its motion;
Beam of sound reflector motion driver part, mainly comprise gyration driver part and translational motion driver part, the gyration driver part is used for making the beam of sound reflector to produce gyration, and the translational motion driver part is used for making the beam of sound reflector to produce translational motion;
Beam of sound reflector control parts of motion in order to control beam of sound reflector motion driver part, then drives the beam of sound reflector and produces motion.
2. audio frequency special efficacy device according to claim 1, it is characterized in that: described parametric acoustic array loudspeaker array can be made of single or multiple parametric array loudspeakers; Its form of structuring the formation must can be aimed at the beam of sound reflector corresponding with it to carry out usable reflection by each beam of sound of assurance; The parametric acoustic array loudspeaker array form of structuring the formation is decided according to the concrete layout of beam of sound reflector, if all beam of sound reflectors are in a plane, the parametric acoustic array loudspeaker array can be arranged to a planar array, if the beam of sound reflector disperses to distribute in the space, each parametric array loudspeaker must be aimed at respectively each self-corresponding beam of sound reflector, forms a solid array in the space.
3. audio frequency special efficacy device according to claim 1, it 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 dynamically adjusting beam of sound by revolution and the translational motion of beam of sound reflector; Adjust the shape of reflected sound wave beam by the change of shape of effective reflecting surface; The direction of propagation of reflected sound wave beam is adjusted in normal by effective reflecting surface and the variation of beam of sound center line angle.
4. audio frequency special efficacy device according to claim 1, it is characterized in that: described beam of sound reflector motion driver part can be made of one of gyration driver part, translational motion driver part, also can be by both consisting of simultaneously.
5. audio frequency special efficacy device according to claim 1, it is characterized in that: described beam of sound reflector control parts of motion can be carried out rhythm, the isoparametric analysis of intensity in progress audio signal, to form the motion control parameter of acoustic reflection body; Under the effect of these motion control parameters, kinematic parameter and the parameter corresponding relations in direct ratio such as audio signal rhythm and intensity such as the velocity of rotation of beam of sound reflector, translational velocity and start-stop rhythm, thus propagation variation and the audio signal variation of beam of sound in the space is mapped.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107967706A (en) * | 2017-11-27 | 2018-04-27 | 腾讯音乐娱乐科技（深圳）有限公司 | Processing method, device and the computer-readable recording medium of multi-medium data |
| CN111726731A (en) * | 2019-03-20 | 2020-09-29 | 比亚迪股份有限公司 | Vehicle, vehicle-mounted sound system, and sound field adjusting method and device |
| CN116744195A (en) * | 2023-08-10 | 2023-09-12 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107967706A (en) * | 2017-11-27 | 2018-04-27 | 腾讯音乐娱乐科技（深圳）有限公司 | Processing method, device and the computer-readable recording medium of multi-medium data |
| CN107967706B (en) * | 2017-11-27 | 2021-06-11 | 腾讯音乐娱乐科技（深圳）有限公司 | Multimedia data processing method and device and computer readable storage medium |
| CN111726731A (en) * | 2019-03-20 | 2020-09-29 | 比亚迪股份有限公司 | Vehicle, vehicle-mounted sound system, and sound field adjusting method and device |
| CN116744195A (en) * | 2023-08-10 | 2023-09-12 | 苏州清听声学科技有限公司 | Parametric array loudspeaker and directional deflection method thereof |
| 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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