An audio output device

Abstract

This invention discloses an audio output device, including a power supply and a CPU electrically connected to each other, and at least two independent acoustic units facing different directions. Each independent acoustic unit is electrically connected to both the CPU and the power supply, and each independent acoustic unit is used to output audio in different frequency bands. This invention uses at least two independent acoustic units to output high, mid, and low frequency sounds separately, with different directions for the audio output. Utilizing the strong directivity of mid-to-high frequency sound transmission and the outward diffusion of low frequency sound transmission, the independent acoustic units outputting mid-to-high frequency sounds can be directed towards the human ear. This achieves the shortest path for mid-to-high frequency sound transmission to the ear, avoiding direct sound interference to surrounding people, effectively reducing environmental noise, achieving directional output, and truly improving energy efficiency—that is, obtaining a longer battery life at the same power output.

Description

Technical Field

[0001] This invention relates to the field of audio equipment, and more specifically to an audio output device. Background Technology

[0002] Currently, most small-sized portable wearable speakers or Bluetooth speakers on the market have a single-cavity acoustic structure. In everyday carry-on use, the speaker's sound output direction is usually pointed outwards from the body. In outdoor wearable applications, this acoustic layout often results in the sound output not being directly directed to the ear. In reality, very little effective music or sound is transmitted to the user's ear after the sound is output from the speaker, with most of the sound signal wasted in useless space. This directly leads to consumers not only failing to obtain the best music or sound effect experience when carrying and using the speaker, but also often having to turn the speaker up to a very high volume in order to hear the music clearly. This further leads to low product energy efficiency, shorter battery life, and wasted power. At the same time, it causes significant noise pollution and discomfort to the surrounding environment. This truly reflects the design flaws and industry status of small-sized portable speaker products at present, failing to simultaneously meet the needs of users in multiple scenarios such as outdoor wear, indoor desktops, and in-car use.

[0003] In addition, some manufacturers have launched neckband-style portable wearable speakers in the past two years. While these products have the advantages of pointing the speaker towards and being close to the ear, their large size and weight concentrated on the user's neck and shoulders make them unsuitable for extended use. The neck is a vital organ area, and the collarbone region has less fat and muscle tissue but more blood vessels and nerves. Therefore, wearing them for a short time becomes very heavy and uncomfortable, similar to headphones. Furthermore, body movements can cause the product to slide around the neck or even fall off, potentially damaging the skin, ligaments, and muscles. This makes them unsuitable for outdoor sports activities. Such user experience and wearing risks render their original design for outdoor wearable acoustics meaningless, failing to truly revolutionize small-sized portable wearable speakers. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an audio output device that solves the problems of poor sound quality and significant noise pollution in portable wearable scenarios for speakers with a single cavity acoustic structure.

[0005] The contents of this invention are as follows:

[0006] An audio output device includes an electrically connected power supply and a CPU, and at least two independent acoustic units facing different directions, each of the independent acoustic units being electrically connected to the CPU and the power supply respectively, and each of the independent acoustic units being used to output audio in different frequency bands.

[0007] Preferably, the independent acoustic unit includes a sealed cavity, a speaker, and a power amplifier circuit. The speaker is disposed in the sealed cavity and electrically connected to the power amplifier circuit. The power amplifier circuit is electrically connected to the CPU and the power supply, respectively.

[0008] Preferably, at least two of the horns are oriented perpendicular to each other.

[0009] Preferably, the CPU is also electrically connected to a state detection unit, which is used to acquire the orientation change signal of the independent acoustic unit.

[0010] Preferably, the state detection unit includes at least one of a gyroscope, an accelerometer, a camera sensor, an infrared human body sensor, an input button, or a wireless signal receiver.

[0011] Preferably, the output frequency band of each of the independent acoustic units can be switched according to the input signal of the state detection unit.

[0012] Preferably, the device also includes a housing, which may be a cuboid, cube, cylinder, elliptical cylinder, disc-shaped or elliptical disc-shaped, and at least two of the independent acoustic units are respectively disposed on adjacent two sides of the housing.

[0013] Preferably, the housing is rectangular, and the horn of one of the independent acoustic units is elliptical or oblong.

[0014] Preferably, a directional output sound-gathering ring is provided on the outer side of the speaker.

[0015] The beneficial effects of this invention are as follows: This invention uses at least two independent acoustic units to separate and reassemble the sound of the high, mid and low frequency bands, and outputs them in different directions. By utilizing the strong directivity of the mid-to-high frequency sound transmission and the characteristic of the low frequency sound transmission spreading in all directions, the independent acoustic units of the output mid-to-high frequency sound can be directed towards the human ear to obtain the shortest path for the mid-to-high frequency sound transmission to the human ear, avoiding the mid-to-high frequency sound from directly pointing to the surrounding crowd, effectively reducing sound interference to the environment, and achieving directional output. Attached Figure Description

[0016] Figure 1 The diagram shown is an overall structural diagram of an embodiment of the present invention;

[0017] Figure 2 The diagram shown is a schematic diagram of scenario 1 of an embodiment of the present invention;

[0018] Figure 3 The diagram shown is a schematic diagram of scenario 2 of an embodiment of the present invention;

[0019] In the diagram, 1 is the radiator, 2 is the speaker of the first independent acoustic unit, 3 is the speaker of the second independent acoustic unit, 4 is the sound ring, 5 is the enclosed cavity of the second independent acoustic unit, 6 is the enclosed cavity of the first independent acoustic unit, HF is the high-frequency sound, MF is the mid-frequency sound, and LF is the low-frequency sound. Detailed Implementation

[0020] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0021] Please refer to Figure 1 This embodiment discloses an audio output device, including a housing, an electrically connected power supply and CPU, and at least two independent acoustic units facing different directions. The power supply, CPU, and independent acoustic units are all disposed within the housing. Each independent acoustic unit is electrically connected to both the CPU and the power supply, and each independent acoustic unit is used to output audio in different frequency bands. This breaks through the inherent design thinking of traditional single-cavity acoustic structures and realizes a vectorized directional acoustic structure. Each independent acoustic unit includes a closed cavity, a speaker, and a power amplifier circuit. The speaker is disposed within the closed cavity and electrically connected to the power amplifier circuit, which is electrically connected to both the CPU and the power supply. Compared with traditional single-cavity acoustic structures, this embodiment provides at least two independent acoustic units, each with an independent closed cavity, which helps to isolate audio in different frequency bands and effectively improves the audio transmission efficiency in the mid- and high-frequency bands.

[0022] When there are two independent acoustic units, one unit outputs mid-to-high frequency audio, and the other outputs low-frequency or mid-to-low frequency audio; alternatively, one unit outputs low-frequency or mid-to-low frequency audio, and the other outputs mid-to-high frequency or full-frequency audio. When there are three independent acoustic units, a richer combination of different frequency band audio outputs can be provided. The independent acoustic unit primarily outputting mid-to-high frequency audio and the unit primarily outputting low-frequency audio are oriented differently to ensure that the mid-to-high frequency audio is directed towards the ear during transmission, while the low-frequency audio diffuses outwards. Extensive experimentation has shown that the optimal effect is achieved when the independent acoustic units outputting mid-to-high frequency audio and those outputting low-frequency audio are oriented perpendicularly to each other. This embodiment uses at least two independent acoustic units to output the sound in the high, mid, and low frequency bands separately, and the audio output directions are different. By utilizing the strong directivity of the mid-to-high frequency sound transmission and the characteristic of the low frequency sound transmission spreading in all directions, the independent acoustic units of the output mid-to-high frequency sound can be pointed towards the human ear to obtain the shortest path for the mid-to-high frequency sound transmission to the human ear, avoiding the mid-to-high frequency sound from directly pointing to the surrounding crowd, effectively reducing sound interference to the environment, and achieving directional output.

[0023] To meet the needs of users in outdoor sports scenarios, the housing in this embodiment can be a cuboid, cube, cylinder, elliptical cylinder, disc, or elliptical disc. In this embodiment, to improve portability, the housing is a flat cuboid. This embodiment employs two independent acoustic units. One independent acoustic unit is located on the front of the housing and is named the first independent acoustic unit; the other independent acoustic unit is located on the top of the housing and is named the second independent acoustic unit. The enclosed cavity 6 of the first independent acoustic unit and the enclosed cavity 5 of the second independent acoustic unit are separated by a partition. The speaker 2 of the first independent acoustic unit is a circular full-range speaker. A radiator 1 is located below the speaker 2 of the first independent acoustic unit. This radiator 1 can be selected for use or omitted according to the actual low-frequency sound quality requirements of the product. The speaker 3 of the second independent acoustic unit is an oblong full-range speaker or an elliptical full-range speaker to reduce the thickness of the housing, achieving an ultra-thin design and further improving the product's portability and flexibility of use.

[0024] The CPU is also electrically connected to a status detection unit, which is used to acquire orientation change signals or human-machine position relationship change signals of the independent acoustic units. The output frequency band of each independent acoustic unit can be switched according to the input signal of the status detection unit. The status detection unit includes at least one of a gyroscope, a G-sensor, a camera sensor, an infrared human body sensor, an input button, or a wireless signal receiver. The wireless signal receiver is specifically at least one of a Bluetooth module, a WIFI module, or a 2G / 3G / 4G / 5G module for connecting to a mobile phone.

[0025] To further prevent the diffusion of mid-to-high frequency sound and enhance the directional output effect of sound, a sound-collecting ring 4 of a certain height is provided on the outside of each speaker.

[0026] Please refer to Figure 2 , Figure 2 Scenario 1 shown simulates a user exercising outdoors. When the user wears the product on the chest strap of a backpack or the left armband, the second independent acoustic unit is located at the top of the housing, making it closest to the user's ear. Therefore, during initialization, the CPU sets the output frequency band of the second independent acoustic unit to the mid-to-high frequency range based on the detection signal from the state detection unit, while setting the output frequency band of the first independent acoustic unit to the low-frequency or mid-to-low frequency range, thereby achieving the optimal sound field output combination.

[0027] Please refer to Figure 3 , Figure 3 Scenario 2 shown simulates an application scenario where a user places the product indoors or in a car. When the user removes the product and places it upright on a desk, or upright on a speaker bracket at the air vent of a car (e.g.,...),... Figure 3 (As shown on the right side of the user), at this time, the first independent acoustic unit is closest to the human ear. The CPU will adjust the output frequency band of each independent acoustic unit according to the detection signal of the state detection unit. That is, the first independent acoustic unit, which was originally used to output low-frequency sound, is changed to output mid-high frequency sound or full-frequency sound, and the second independent acoustic unit, which was originally used to output mid-high frequency sound, is used to output low-frequency sound.

[0028] When the user removes the product and places it horizontally on a desk or in-car console (as shown on the user's left in the image), the second independent acoustic unit is closest to the human ear. The CPU adjusts the output frequency band of each independent acoustic unit according to the detection signal from the state detection unit. That is, the first independent acoustic unit, which was originally used to output mid-high frequency or full-frequency sound, is changed to output low-frequency sound, and the second independent acoustic unit, which was originally used to output low-frequency sound, is used to output mid-high frequency or full-frequency sound. Through this vectorized adjustment, it is ensured that the user can hear music or sound with the optimal sound field layout in indoor or driving scenarios.

[0029] This embodiment can flexibly adjust the output frequency band of the independent acoustic unit according to different human-machine positions between the user and the product, ensuring that the mid-to-high frequency sound is directly directed to the user's ears and reducing the impact of mid-to-high frequency sound on the surrounding environment.

[0030] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the above-described embodiments. Any embodiment that achieves the technical effects of the present invention using the same means should fall within the protection scope of the present invention. Within the protection scope of the present invention, various modifications and variations can be made to the technical solutions and / or implementation methods.

Claims

1. An audio output device, characterized in that: The device includes an electrically connected power supply and a CPU, and at least two independent acoustic units facing different directions. Each independent acoustic unit is electrically connected to both the CPU and the power supply, and each independent acoustic unit is used to output audio in different frequency bands. The CPU is also electrically connected to a status detection unit, which is used to acquire orientation change signals or human-machine position relationship change signals of the independent acoustic units. The CPU can determine the independent acoustic unit closest to the human ear based on the orientation change signals or human-machine position relationship change signals of the independent acoustic units. The output frequency band of each independent acoustic unit can be switched according to the input signal of the status detection unit. The independent acoustic unit includes a closed cavity, a speaker, and a power amplifier circuit. The speaker is disposed in the closed cavity and electrically connected to the power amplifier circuit. The power amplifier circuit is electrically connected to the CPU and the power supply, respectively. At least two of the speakers are oriented perpendicularly to each other.

2. The audio output device as described in claim 1, characterized in that: The status detection unit includes at least one of a gyroscope, an accelerometer, a camera sensor, an infrared human body sensor, an input button, or a wireless signal receiver.

3. The audio output device as described in claim 1, characterized in that: It also includes a housing, which includes a cuboid, cube, cylinder, elliptical cylinder, disc shape or elliptical disc shape, and at least two of the independent acoustic units are respectively disposed on adjacent two sides of the housing.

4. The audio output device as described in claim 3, characterized in that: The housing is rectangular, and the horn of one of the independent acoustic units is elliptical or oblong.

5. The audio output device as described in claim 3 or 4, characterized in that: A directional output sound-collecting ring is provided on the outside of the speaker.

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