Multi-sensory decentralized audio playback device

Abstract

The utility model relates to multi -sensory's decentralization audio frequency playing equipment, include: the wedge shape casing and have four around central axis arrangement side sound -emitting surface, a plurality of loudspeaker combination, including active loudspeaker unit and passive radiation unit, active loudspeaker unit and have electric wiring, passive radiation unit no electric wiring, active loudspeaker unit and passive radiation unit are arranged in the opening in cross interval on four side sound -emitting surface, and every side sound -emitting surface is configured at least one active loudspeaker unit and one passive radiation unit, active loudspeaker unit is arranged in interval on four side sound -emitting surface according to left and right sound track, the active loudspeaker unit on two side sound -emitting surfaces of four side sound -emitting surfaces is fed left sound track signal and right sound track signal respectively, the utility model has the advantages of: realizing omnidirectional balanced double -channel playback, suppressing reflection interference in compact volume, satisfying miniaturization, best listening position decentralization, best listening effect wide -area full -coverage application demand.

Description

Technical Field

[0001] This utility model relates to the field of omnidirectional audio playback device technology, specifically a multi-sensory decentralized audio playback device. Background Technology

[0002] As consumers demand higher sound quality and a better spatial experience from desktop speaker systems, the limitations of the traditional two-channel "sweet spot" are becoming increasingly apparent. The "sweet spot" is the acoustically high-fidelity listening area, also known as the optimal listening position or the optimal listening center. Current technologies generally arrange two active speakers simply side-by-side, using desktop reflections or cabinet tilt to expand the listening area. However, this still relies on the listener being positioned near the left-right axis of symmetry; once off-center, the stereo image collapses rapidly, and desktop reflections cause comb filtering in the mid-to-high frequencies, reducing soundstage clarity. To improve low-frequency extension, some solutions use passive radiators, but these are mostly limited to unidirectional radiation, failing to solve the problem of omnidirectional uniformity. Furthermore, desktop devices combining lighting and fragrance functions with audio are emerging; however, their acoustic components still use the aforementioned unidirectional or bidirectional layouts, resulting in an excessively small optimal listening position range within the sound field. Additionally, lighting and fragrance modules are often placed along the sound radiation path, causing additional diffraction and resonance.

[0003] In summary, existing desktop audio systems still lack a compact and acoustically sound solution that eliminates the "sweet spot," suppresses desktop reflections, balances omnidirectional two-channel sound, and simultaneously provides multi-sensory stimulation. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-sensory decentralized audio playback device. This device offers a compact and acoustically sound solution that eliminates the "sweet spot," suppresses desktop reflections, balances omnidirectional dual-channel listening, and simultaneously provides multi-sensory stimulation.

[0005] To achieve the above objectives, a multi-sensory decentralized audio playback device is designed, comprising: a housing, the housing being wedge-shaped and having four side sound-emitting surfaces arranged around the central axis of the housing, each side sound-emitting surface having an opening; a combination of multiple speakers, the speaker combination including active speaker units and passive radiating units, the active speaker units having electrical wiring, and the passive radiating units having no electrical wiring; the active speaker units and passive radiating units are arranged at intervals across the openings on the four side sound-emitting surfaces, with at least one active speaker unit and one passive radiating unit configured on each side sound-emitting surface; the active speaker units are arranged on the four side sound-emitting surfaces according to left and right channel intervals, forming an omnidirectional dual-channel radiation pattern; the active speaker units on adjacent side sound-emitting surfaces of the four side sound-emitting surfaces are respectively fed left channel signals and right channel signals, so that complete dual-channel information can be received at any position within a horizontal 360-degree range; a control circuit, disposed inside the housing, for receiving external audio signals and driving the active speaker units; and a power supply module for supplying power to the control circuit and the active speaker units.

[0006] Preferably, the present invention further includes: the sound-emitting surfaces on each side are inclined upward relative to the horizontal plane.

[0007] Preferably, the present invention further includes: a sealed cavity defined inside the housing, the total effective volume of the sealed cavity matching the sum of the rear cavity volumes of all speaker assemblies, so that the low-frequency cutoff frequency of the whole unit is not higher than a specified value; and gaps are left between the opposing speaker assemblies and adjacent speaker assemblies inside the housing to prevent abnormal noise from being generated by rigid collision between the speaker assemblies.

[0008] Preferably, the present invention further includes: an active speaker unit comprising a voice coil, a diaphragm, a magnetic circuit, a bracket, and terminals, used to convert electrical signals into sound for playback; the voice coil of the active speaker unit is bonded to the root of the diaphragm and suspended in the air gap of the magnetic circuit; the magnetic circuit is fixed to the housing by the bracket and screws; and the control circuit is electrically connected to the magnetic circuit and the voice coil through the terminals. A passive radiating unit comprising only a diaphragm, a surround, and a counterweight is used to cooperate with the active speaker unit in vibrating due to the air pressure within the housing, thereby enhancing the low-frequency sound playback of the speaker assembly. The outer edge of the surround of the passive unit is sealed with adhesive to the opening on the sound-emitting surface of the housing; the diaphragm of the passive radiating unit is coplanar with the diaphragm of the active speaker unit; the counterweight is attached to the center of the inner surface of the diaphragm; and the entire passive unit is suspended within the cavity of the housing, sharing the same cavity volume as the active speaker unit within the same housing. The radiating mass and size of the passive radiating unit are configured to match the resonant frequency of the active speaker unit to improve the low-frequency sound pressure level and extend the low-frequency extension.

[0009] Preferably, the present invention further includes an impedance matching module, which measures the voltage, current and phase of each active electroacoustic transducer, calculates the total load impedance in real time, and automatically selects the series or parallel connection method to match the overall load impedance of the speaker assembly with the output power amplification stage of the control circuit.

[0010] Preferably, the present invention further includes: on one side of the sound-emitting surface, an active speaker unit is disposed above and a passive radiating unit is disposed below; on the sound-emitting surface adjacent to the sound-emitting surface, an active speaker unit is disposed below and a passive radiating unit is disposed above; the rear structures of the active speaker units on the two adjacent sound-emitting surfaces form a clearance, thereby maximizing the effective volume of the sealed cavity while keeping the outer volume of the shell to a minimum.

[0011] Preferably, the present invention further includes: a lighting component integrated inside the housing for providing ambient light; the lighting component is arranged around the inner edge of the housing and can dynamically adjust its brightness and color temperature according to changes in the frequency, rhythm or amplitude of the audio signal.

[0012] Preferably, the present invention further includes: a humidifier module, wherein the atomizing outlet of the humidifier module is located at the top of the housing for releasing water mist synchronously when playing audio; or, a fragrance module, wherein the fragrance module has a replaceable fragrance pad and a miniature fan for diffusing the fragrance to the surrounding environment with the water mist or airflow.

[0013] Preferably, the present invention further includes: the control circuit supports Bluetooth and USB flash drive audio input.

[0014] Preferably, the present invention further includes a top cover disposed on the top of the housing and a bottom plate disposed on the bottom of the housing.

[0015] Compared with the prior art, the advantages of this utility model are: This invention arranges four side-emitting sound surfaces in a wedge shape on a tabletop, all tilted towards the ceiling. This allows the main sound axis of each unit to be reflected by the ceiling before entering the ear, significantly reducing the comb-like filtering caused by direct reflection from the tabletop. Simultaneously, the reflection path extends the sound path, effectively increasing the acoustic radiation distance while maintaining a small enclosure size, thus achieving a more uniform frequency response under close-range listening conditions. The four sides are cross-configured with active electroacoustic transducers for the left and right channels, ensuring that left and right channel information is received simultaneously from any direction in the horizontal plane, eliminating the traditional "sweet spot" limitation and achieving omnidirectional dual-channel imaging in the horizontal plane. Passive low-frequency radiating units, spaced apart on the same surface, share a rear cavity with the active units. The sound pressure inside the cavity drives the passive units, increasing the low-frequency quantity and lowering the low-frequency resonant frequency, thus achieving a smaller volume. The enclosure achieves low-frequency extension comparable to larger bass-reflex enclosures; its four-sided radiating structure evenly distributes low-frequency energy throughout the space, reducing local standing waves and improving low-frequency clarity; a 45° tilt angle balances acoustic directivity and enclosure height, combined with an inverted stepped internal layout, maximizing the effective volume of the rear cavity while limiting desktop footprint, ensuring the acoustic volume required for the active unit and preventing an increase in cutoff frequency; pre-reserved gaps within the housing prevent rigid collision noises when multiple units are operating simultaneously; the lighting assembly, humidifier, and fragrance module are positioned on the upper part or edge of the housing, avoiding the main sound radiation surface, reducing additional diffraction, and simultaneously providing light, humidity, and odor stimulation during playback, creating a multi-sensory synergy of sound, light, and smell to enhance the listening experience; the system supports both Bluetooth and USB flash drive audio input methods for convenient use in different scenarios. This structure achieves omnidirectional balanced dual-channel reproduction, extended low frequencies, suppression of desktop reflection interference, and integrated multi-sensory functions within a compact desktop volume, meeting the application requirements of miniaturization, low footprint, decentralized optimal listening position, and wide-area coverage for optimal listening effect. Attached Figure Description

[0016] Figure 1 This is a perspective view of the utility model; Figure 2 This is a front view of the present invention; Figure 3 yes Figure 2 AA-section sectional view; Figure 4 This is the left view of this utility model; Figure 5 This is a top view of the present invention; In the diagram: 10 housing, 11 side sound-emitting surface, 12 sealed cavity, 20 speaker assembly, 21 active speaker unit, 22 passive radiator unit, 31 top cover, bottom plate 32. Detailed Implementation

[0017] To make the purpose, principle and structure of this utility model clearer, the following description is provided in conjunction with the accompanying drawings and specific embodiments.

[0018] See Figure 1-5 This utility model provides a multi-sensory decentralized audio playback device.

[0019] The multi-sensory decentralized audio playback device provided by this utility model is wedge-shaped and consists of a housing 10, a speaker assembly 20, a control circuit, a power module, a top cover 31, and a bottom plate 32. The speaker assembly 20 includes an active speaker unit 21 and a passive radiator unit 22.

[0020] The housing 10 is manufactured using a one-piece molding or splicing process, with an outer contour of a truncated pyramid. Four side-emitting surfaces 11 are provided around the perimeter of the housing 10, inclined at a certain angle to the horizontal plane and evenly arranged around the central axis. The speaker assembly 20 is mounted on the side-emitting surfaces 11, each inclined towards the ceiling to reduce interference of the played audio with the bottom of surfaces such as desktops and base plates, minimizing the disruption of the optimal listening environment caused by ground reflections. The top and bottom edges of the four side-emitting surfaces 11 enclose the housing 10, and the top cover 31 and bottom plate 32 respectively mate with the top and bottom edges of the side-emitting surfaces 11, together forming a closed housing 10.

[0021] Each side of the sound-emitting surface 11 has two openings, one above the other. The two openings are: the upper opening is a circular through hole as the mounting position of the active speaker unit 21, and the lower opening is an elliptical through hole as the mounting position of the passive radiating unit 22; or, the lower opening is a circular through hole as the mounting position of the active speaker unit 21, and the upper opening is an elliptical through hole as the mounting position of the passive radiating unit 22.

[0022] The active speaker units 21 of two adjacent side-emitting surfaces 11 are arranged upside down in the height direction. That is, if the active speaker unit 21 of surface A is located above and the passive radiating unit 22 is located below, then the active speaker unit 21 of surface B, which is adjacent to surface A, is located below and the passive radiating unit 22 is located above. This alternation makes the magnetic circuits of the rear of the adjacent active speaker units 21 staggered and avoid each other inside the housing 10. This maximizes the effective volume of the sealed cavity 12 while keeping the external dimensions unchanged, improves the space utilization of the sealed cavity 12, and makes the device itself more compact.

[0023] Preferably, the top of the housing 10 has a stepped stop for mounting the top cover 31; the bottom of the housing 10 has a raised edge for fixing with screws to the base plate 32. After assembly, the top cover 31, the base plate 32 and the housing 10 together form a sealed cavity 12 that is connected to the outside world only through the speaker diaphragm. The total effective volume of the sealed cavity 12 matches the sum of the rear cavity volumes of all speaker assemblies 20, so that the low-frequency cutoff frequency of the whole unit can be lower and the low-frequency effect is better.

[0024] The loudspeaker assembly 20 consists of an active speaker unit 21 and a passive radiator unit 22. The active speaker unit 21 uses a circular diaphragm with a voice coil bonded to its root. The voice coil is suspended in the air gap of the magnetic circuit, which is fixed to the side sound-emitting surface 11 of the housing 10 by four self-tapping screws. The control circuit is located within the sealed cavity 12, and the left and right channel signals output by the control circuit are fed to the corresponding active speaker units 21 via terminals. The passive radiator unit 22 uses an elliptical composite diaphragm. The outer edge of the diaphragm is connected to the elliptical opening of the housing 10 by self-tapping screws. A counterweight is attached to the center of the inner surface of the diaphragm of the passive radiator unit 22. The mass of the counterweight is calculated based on the required resonant frequency, ensuring that the passive radiator unit 22 and the active speaker unit 21 resonate together within the sealed cavity 12, thereby increasing low-frequency sound pressure and extending bass extension.

[0025] On the four side sound-emitting surfaces 11, active speaker units 21 and passive radiating units 22 are arranged alternately, with each surface containing at least one active speaker unit 21 and at least one passive radiating unit 22. The four active speaker units 21 on the four side sound-emitting surfaces 11 feed signals in the order of "left channel - right channel - left channel - right channel", forming a horizontal 360° omnidirectional dual-channel radiation pattern, so that the listener can receive complete left and right channel information at any location. The listener can experience a fused audio listening experience based on the left and right dual-channel audio heard from any position in the space.

[0026] The control circuit and power module are mounted on the inner base plate 32 of the housing 10. The control circuit uses a printed circuit board, with a Bluetooth 5.0 audio receiver module, a USB-A socket, and a power amplifier arranged on the front, and an impedance matching module arranged on the back. The impedance matching module samples the voltage, current, and phase of each active speaker unit 21 to calculate the total load impedance in real time. When it detects that multiple external active speaker units 21 are causing low impedance, it automatically switches the internal wiring array, changing the originally parallel units to a series configuration, so that the overall load impedance is maintained at an ideal value, ensuring matching with the amplifier's output power stage. The power module is an external input, supplying power to both the digital and analog circuits.

[0027] The active speaker units 21 on adjacent side sound-emitting surfaces 11 inside the housing 10 are staggered vertically to avoid each other, and there is a gap between the rear parts of the active speaker units 21 on opposite side sound-emitting surfaces 11 inside the housing 10 to prevent the active speaker units 21 from colliding with each other and producing abnormal noise when the amplitude is large.

[0028] Preferably, the top cover 31 has an atomizing outlet in the center, and the ceramic atomizing plate of the humidifier module is fixed below the outlet by a silicone ring. The atomizing plate driving circuit is arranged on the same printed circuit board as the control circuit. When working, it starts and stops synchronously with the amplitude of the audio signal, and the water mist diffuses upward through the outlet.

[0029] Preferably, the top cover 31, bottom plate 32, and side sound-emitting surface 11 of the housing 10 can all be made of transparent material, such as glass or transparent resin. An LED light strip is also arranged inside the transparent housing 10, and the light strip surrounds the inner edge of the housing 10. The control circuit extracts low-frequency energy according to the audio signal spectrum, and drives the LED through the dimming chip to realize the dynamic change of brightness and color temperature with the rhythm.

[0030] The fragrance module is embedded inside the top cover 31 to facilitate the upward diffusion of fragrance. It consists of a replaceable fragrance chip and a mini centrifugal fan with the fan outlet facing upward, so that the fragrance can be evenly diffused into the surrounding environment with the airflow.

[0031] A wire through hole is provided on the base plate 32. The external power supply passes through the socket and is connected to the power module inside the housing 10 via the hole. A rubber protective coil is added between the socket and the base plate 32 to prevent the solder pads from falling off due to pulling.

[0032] During assembly, the active speaker unit 21 and the passive radiator unit 22 are first pressed into their corresponding openings. Screws are then used to secure the active speaker unit 21 and the passive radiator unit 22 to the side sound-emitting surface 11. After applying adhesive to the edges of the diaphragms of both units, they are bonded and cured to the edges of the openings on the side sound-emitting surface 11. Subsequently, the control circuit and power module are fixed to the base plate 32, and the speaker leads are connected via terminals. The humidifier module and LED light strip are inserted into their respective pre-installed sockets. The fragrance module is snapped into the top cover 31. Finally, the top cover 31, base plate 32, and housing 10 are secured with self-tapping screws, welded, or bonded. The overall height is set to a low profile, resulting in a small overall bottom projection size, making it suitable for placement on a desktop or floor without obstructing the view. During use, users can pair via Bluetooth or insert a USB flash drive to play audio. The device presents a stable dual-channel sound image from any position on the horizontal plane, with strong low-frequency extension, accompanied by water mist, fragrance, and dynamic light effects, achieving a comprehensive sensory experience encompassing sound, light, and smell.

[0033] In use, regardless of the listener's position within the listening space, both ears will be directed towards at least two adjacent side sound-emitting surfaces 11, which respectively output audio from the left and right channels. When the listener moves within the listening space, they gradually move away from the direction of one of the side sound-emitting surfaces 11, and the loss of audio output from that side sound-emitting surface 11 can be passively compensated for by the other side sound-emitting surface 11. For example, if ABC are three adjacent side-emitting surfaces 11, and the listener's initial position is facing surfaces A and B, then surfaces A and B are playing the left and right channel audio respectively. Correspondingly, when viewed from the side, surface C is playing the same left channel audio as surface A. When the listener moves away from surface A and towards surface C, the left channel audio effect heard by the listener from surface A weakens, but at the same time, the left channel audio effect heard from surface C gradually strengthens, forming a corresponding compensation effect. When the left and right channels reach the listener's ears together, a fused hearing effect is produced, and the positional changes of the left and right channels are almost imperceptible.

[0034] Therefore, within the same listening space, the "sweet spot" (the mandatory optimal listening position determined by a single left or right channel) is eliminated as much as possible. This ensures that any position in the entire space is within a dual-channel blended listening environment. Listeners can move freely within the space without any change in the listening experience. This completely decentralizes and widens the optimal listening position, creating a uniform sound field and a wide-range coverage of the optimal listening effect. The optimal listening effect provides omnidirectional, wide-area coverage throughout the entire listening space, maximizing the coverage of the optimal listening effect. Removing the "sweet spot" (or optimal listening center) extends high-fidelity sampling to the entire space, making each position an independent node, no longer relying on a single point of authority; hence, it can be called decentralized. It is suitable for various applications such as music therapy, music appreciation, and music hypnosis that require a wide-range optimal listening position.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A multi-sensory decentralized audio playback device, characterized in that, include: A housing, the housing being wedge-shaped and having four side sound-emitting surfaces, the four side sound-emitting surfaces being arranged around the central axis of the housing, and each side sound-emitting surface having an opening; A combination of multiple loudspeakers, the loudspeaker combination including active speaker units and passive radiator units, the active speaker units having electrical wiring and the passive radiator units having no electrical wiring; The active speaker unit and the passive radiating unit are arranged at intervals across the openings on the four side sound-emitting surfaces, and each side sound-emitting surface is equipped with at least one active speaker unit and one passive radiating unit. The active speaker units are arranged on the four side sound-emitting surfaces according to the left and right channel intervals, forming an omnidirectional dual-channel radiation pattern. The active speaker units on adjacent side sound-emitting surfaces of the four side sound-emitting surfaces are respectively fed with left channel signals and right channel signals, so that complete dual-channel information can be received at any position within a horizontal 360-degree range. The control circuit, located inside the housing, is used to receive external audio signals and drive the active speaker unit; The power module is used to supply power to the control circuit and the active speaker unit.

2. The multi-sensory decentralized audio playback device as described in claim 1, characterized in that, The sound-emitting surfaces on each side are tilted upwards relative to the horizontal plane.

3. The multi-sensory decentralized audio playback device as described in claim 1, characterized in that, The housing contains a sealed cavity, the total effective volume of which matches the sum of the rear cavity volumes of all speaker assemblies, ensuring that the low-frequency cutoff frequency of the entire unit does not exceed a specified value; gaps are left between the opposing speaker assemblies and adjacent speaker assemblies within the housing to prevent abnormal noise caused by rigid collisions between the speaker assemblies.

4. The multi-sensory decentralized audio playback device as described in claim 1, characterized in that, The active speaker unit consists of a voice coil, a diaphragm, a magnetic circuit, a bracket, and terminals. It is used to convert electrical signals into sound for playback. The voice coil of the active speaker unit is bonded to the root of the diaphragm and suspended in the air gap of the magnetic circuit. The magnetic circuit is fixed to the housing by the bracket and screws. The control circuit is electrically connected to the magnetic circuit and the voice coil through the terminals. The passive radiator unit consists only of a diaphragm, a surround, and a counterweight. It is used to vibrate in conjunction with the active speaker unit's vibration due to air pressure within the housing, thereby enhancing the low-frequency sound reproduction of the speaker combination. The outer edge of the surround of the passive radiator unit is sealed with adhesive to the opening on the sound-emitting surface of the housing side. The diaphragm of the passive radiator unit is oriented in the same plane as the diaphragm of the active speaker unit. The counterweight is attached to the center of the inner surface of the diaphragm. The entire passive radiator unit is suspended within the cavity of the housing and shares the same cavity volume with the active speaker unit within the same housing. The radiation quality and size of the passive radiating unit are configured to match the resonant frequency of the active speaker unit in order to improve the low-frequency sound pressure level and extend the low-frequency depth.

5. The multi-sensory decentralized audio playback device as described in claim 1, characterized in that, It also includes an impedance matching module, which measures the voltage, current and phase of each active electroacoustic transducer, calculates the total load impedance in real time, and automatically selects the series or parallel connection method to match the overall load impedance of the speaker assembly with the output power amplification stage of the control circuit.

6. The multi-sensory decentralized audio playback device as described in claim 3, characterized in that, On one side of the sound-emitting surface, the active speaker unit is positioned above and the passive radiating unit is positioned below. On the side of the sound-emitting surface adjacent to this side, the active speaker unit is positioned below and the passive radiating unit is positioned above. The rear structures of the active speaker units on the two adjacent side of the sound-emitting surface form a clearance, thereby maximizing the effective volume of the sealed cavity while keeping the outer volume of the shell to a minimum.

7. The multi-sensory decentralized audio playback device as described in claim 1, characterized in that, It also includes lighting components, integrated inside the housing, for providing ambient light; The lighting components are arranged around the inner edge of the housing and can dynamically adjust their brightness and color temperature according to changes in the frequency, rhythm, or amplitude of the audio signal.

8. The multi-sensory decentralized audio playback device as described in claim 1, characterized in that, It also includes a humidifier module, the atomization outlet of which is located at the top of the housing and is used to release water mist synchronously when playing audio; Alternatively, it may include a fragrance module with replaceable fragrance pads and a miniature fan for diffusing fragrance into the surrounding environment with water mist or airflow.

9. The multi-sensory decentralized audio playback device as described in claim 1, characterized in that, The control circuit supports Bluetooth and USB flash drive audio input.

10. The multi-sensory decentralized audio playback device as described in claim 1, characterized in that, It also includes a top cover located at the top of the housing and a bottom plate located at the bottom of the housing.

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