Combined sound system

Abstract

The utility model discloses a combined sound system, which comprises a first audio playing unit and a second audio playing unit, and sound waves emitted by the first audio playing unit are medium-high frequency sound waves processed by high-pass filtering; the sound waves emitted by the second audio playing unit are low-frequency sound waves after low-pass filtering processing. Through the design, an audio signal emitted by sound source equipment can be received by the two playing units and is accurately divided into two frequency bands by the two playing units, and the two frequency bands are respectively processed and played by the different playing units, so that the first audio playing unit is only used for replaying middle and high pitches; the second audio playing unit is only used for playing bass, and the first audio playing unit and the second audio playing unit are fused into a complete sound in auditory sense, so that an audience can obtain a complete audio signal, a three-dimensional surround sound effect can be realized, bass performance can be considered, and the audience is ensured to have relatively good sound playback experience.

Description

Technical Field

[0001] This utility model relates to the field of audio system technology, and more specifically, to a combined audio system. Background Technology

[0002] The most common forms of consumer audio products are active speakers and open-back headphones, each with its own characteristics in terms of structure, function, and application scenarios.

[0003] An active speaker enclosure, also known as a loudspeaker box, is a specially designed enclosure in which high, mid, and low frequency speakers are assembled, and the high, mid, and low frequency signals are sent to the corresponding speakers for reproduction through a crossover network.

[0004] An active speaker consists of one or more speaker units, and uses a crossover network to distribute different frequencies of sound to the corresponding speaker units. The speaker units are usually installed in a sealed or open enclosure. The main function of the enclosure is to prevent acoustic short circuits and enhance bass performance.

[0005] Based on whether they have a built-in power amplifier, active speakers can be divided into two main categories: active speakers and passive speakers. Active speakers integrate the power amplifier and speaker unit into one unit. This design simplifies the system architecture and is suitable for various scenarios such as home and portable systems.

[0006] The bass performance of an active speaker is closely related to the size of the speaker unit and the volume of the enclosure. Generally speaking, the larger the speaker unit and the larger the enclosure volume, the deeper and stronger the bass response. Two separate active speakers or an active speaker that integrates two speakers can be combined to form a stereo or audio system. Compared to monaural speakers, stereo systems can widen the sound image of the reproduced sound, making the sound more natural and pleasing to the listener.

[0007] When the audience uses, such as Figure 1 When listening to ordinary music, the width of the integrated speaker shown is basically located between the two speaker units, resulting in insufficient spatial sense of the sound and an inability to create a wider sound field.

[0008] Open-back headphones come in many forms, and can be categorized into in-ear, semi-in-ear, and over-ear types based on how they are worn. Each type has its own advantages in terms of comfort, noise isolation, and sound quality. Due to the different sound-producing principles of open-back headphones and active speakers, despite their small size, open-back headphones can produce deep bass and a relatively large volume within a limited space through precisely designed diaphragms and cavity structures. However, because open-back headphones are worn directly against the ears, they are prone to the "center-of-the-head effect," where the sound seems to be concentrated in the center of the head, making it difficult to create a natural stereo or surround sound effect. Even with DSP algorithms, it is difficult to achieve a satisfactory stereo or surround sound effect. Utility Model Content

[0009] To overcome the shortcomings of existing technologies, this utility model provides a combined audio system that combines good bass performance and stereo surround sound effects, achieving an immersive dimension that traditional single-form audio systems cannot reach.

[0010] The technical solution of this utility model is as follows: A combined audio system, comprising:

[0011] The first audio playback unit has a built-in first signal processing unit. The first audio playback unit is used to receive audio signals sent by the audio source device. The first signal processing unit performs high-pass filtering on the audio signals so that the sound waves emitted by the first audio playback unit are mid-to-high frequency sound waves after high-pass filtering.

[0012] The second audio playback unit has a built-in second signal processing unit. The second audio playback unit is used to receive audio signals sent by the audio source device. The second signal processing unit performs low-pass filtering on the audio signals so that the sound waves emitted by the second audio playback unit are low-frequency sound waves after low-pass filtering.

[0013] Furthermore, the first audio playback unit is an open-back headphone or an active speaker, and the second audio playback unit is an open-back headphone or an active speaker.

[0014] Furthermore, when the first audio playback unit is an active speaker, the first audio playback unit is connected to the audio source device via wired or wireless communication; when the first audio playback unit is an open-back headphone, the first audio playback unit is connected to the audio source device via wireless communication.

[0015] Furthermore, when the second audio playback unit is an active speaker, the second audio playback unit is connected to the audio source device via wired or wireless communication; when the second audio playback unit is an open-back headphone, the second audio playback unit is connected to the audio source device via wireless communication.

[0016] Furthermore, the wireless communication method is either Bluetooth wireless communication or 2.4G wireless communication.

[0017] Furthermore, the first signal processing unit is a high-pass filter processor.

[0018] Furthermore, the second signal processing unit is a low-pass filter processor.

[0019] The beneficial effects of this utility model according to the above solution are as follows: This utility model provides a combined audio system, including a first audio playback unit and a second audio playback unit. The first audio playback unit has a built-in first signal processing unit, which is used to receive audio signals sent by an audio source device. The first signal processing unit performs high-pass filtering on the audio signals so that the sound waves emitted by the first audio playback unit are mid-to-high frequency sound waves after high-pass filtering. The second audio playback unit has a built-in second signal processing unit, which is used to receive audio signals sent by an audio source device. The second signal processing unit performs low-pass filtering on the audio signals so that the sound waves emitted by the second audio playback unit are low-frequency sound waves after low-pass filtering. With this design, the audio signal emitted by the audio source device can be received by two playback units and precisely divided into two frequency bands by the two playback units. Each frequency band is processed and played by a different playback unit. This allows the first audio playback unit to focus solely on the reproduction of mid-to-high frequencies, while the second audio playback unit focuses solely on the playback of bass frequencies. The two frequencies are audibly integrated into a complete sound, enabling listeners to obtain a complete audio signal. This not only achieves a stereo surround sound effect but also takes into account bass performance, ensuring listeners have a good sound reproduction experience. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a traditional integrated speaker.

[0022] Figure 2This is a structural block diagram of a combined audio system according to an embodiment of the present utility model;

[0023] Figure 3 A flowchart illustrating the workflow of the combined audio system provided as a preferred embodiment.

[0024] In the figure, 1 is the first audio playback unit; 11 is the first signal processing unit; 2 is the second audio playback unit; and 21 is the second signal processing unit. Detailed Implementation

[0025] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present invention by way of example, but should not be used to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments.

[0026] To better understand this utility model, the following description, in conjunction with the accompanying drawings and embodiments, will further illustrate the present utility model:

[0027] See Figure 2 As shown in the figure, the present invention provides a combined audio system including a first audio playback unit 1 and a second audio playback unit 2. The first audio playback unit 1 is used to receive audio signals sent by an audio source device. A first signal processing unit 11 performs high-pass filtering on the audio signals so that the sound waves emitted by the first audio playback unit 1 are mid-to-high frequency sound waves after high-pass filtering. The second audio playback unit 2 has a built-in second signal processing unit 21. The second audio playback unit 2 is used to receive audio signals sent by an audio source device. The second signal processing unit 21 performs low-pass filtering on the audio signals so that the sound waves emitted by the second audio playback unit 2 are low-frequency sound waves after low-pass filtering.

[0028] Specifically, through this design, the audio signal emitted by the audio source device can be received by two playback units and precisely divided into two frequency bands by the two playback units. These bands are then processed and played by different playback units, so that the first audio playback unit 1 is only used to reproduce mid-high frequencies, and the second audio playback unit 2 is only used to reproduce low frequencies. The two are audibly integrated into a complete sound, allowing the listener to obtain a complete audio signal. This not only achieves a stereo surround sound effect but also takes into account bass performance, ensuring that the listener has a good sound reproduction experience.

[0029] It should be noted that the first audio playback unit 1 can be an open-back headphone or an active speaker, and the second audio playback unit 2 can be an open-back headphone or an active speaker. This application does not make specific limitations, and those skilled in the art can choose the combination of these two according to actual needs.

[0030] As a preferred embodiment, the first audio playback unit 1 is preferably an active speaker, and the second audio playback unit 2 is preferably an open-back headphone. The following description will elaborate on this preferred embodiment:

[0031] Figure 3 The flowchart of the combined audio system provided in this preferred embodiment is shown. The combined audio system includes an active speaker and an open-back headphone. In the combined audio system, the active speaker and the open-back headphone are combined together to reproduce the same sound source.

[0032] Among them, open-back headphones receive audio signals sent by the audio source device wirelessly, while powered speakers receive audio signals sent by the audio source device via wired or wireless means. This combination, compared to a standalone powered speaker or a standalone open-back headphone, balances good bass performance and stereo surround sound effects, achieving an immersive dimension that traditional single-form audio systems (standalone powered speakers or standalone open-back headphones) cannot reach.

[0033] Specifically, the active speaker has a built-in first signal processing unit 11. The active speaker receives audio signals sent by the audio source device via wired or wireless means. Preferably, the active speaker receives audio signals sent by the audio source device via wired means. Receiving audio signals sent by the audio source device via wired means can support the transmission of uncompressed digital audio signals (such as via USB or optical fiber interface), thereby ensuring the integrity of the audio signal, preserving more audio details, and thus providing a higher quality listening experience.

[0034] The first signal processing unit 11 performs high-pass filtering on the audio signal to ensure that the sound waves emitted by the active speaker are mid-to-high frequency sound waves after high-pass filtering, so that the active speaker is only used to reproduce mid-to-high frequencies.

[0035] The open-back headphones have a built-in second signal processing unit 21. The headphones wirelessly receive audio signals from the source device. The second signal processing unit 21 performs low-pass filtering on the audio signals to ensure that the sound waves emitted by the open-back headphones are low-frequency sound waves after low-pass filtering, allowing the headphones to be used solely for bass playback. When a listener uses the combined audio system provided in this embodiment, the mid-to-high frequency sound waves emitted by the active speakers and the low-frequency sound waves emitted by the open-back headphones are audibly blended into a complete sound, allowing the listener to obtain a complete audio signal. This not only achieves a stereo surround sound effect but also maintains bass performance, ensuring a good sound reproduction experience for the listener.

[0036] Furthermore, active speakers can further widen the sound field by employing DSP algorithms to achieve a certain surround sound effect. Since this application does not involve improvements to DSP algorithms, the embodiments of this application will not describe them in detail.

[0037] The first signal processing unit 11 is a high-pass filter processor, and the second signal processing unit 21 is a low-pass filter processor.

[0038] It is worth mentioning that the range of sound wave frequencies perceptible to the human ear is 20Hz to 20kHz. In this embodiment, low frequency refers to 20Hz to fc, and mid-high frequency refers to fc to 20kHz, where fc is between 100Hz and 800Hz. Of course, those skilled in the art can divide low frequency and mid-high frequency according to different frequency band division rules; this is only an exemplary description.

[0039] Specifically, the wireless communication method is either Bluetooth wireless communication or 2.4G wireless communication. It should be noted that the wireless communication method in this embodiment is not limited to Bluetooth wireless communication and 2.4G wireless communication; these are merely illustrative examples.

[0040] To further illustrate this point, this embodiment also provides a method for using the above preferred solution, as detailed below:

[0041] First, listeners wear open-back headphones so they can hear the sound waves emitted by the external powered speakers. When the powered speakers and open-back headphones reproduce the same sound source, the listener's ears can receive the low-frequency sound waves emitted by the open-back headphones and the mid-to-high-frequency sound waves emitted by the powered speakers, thus creating a stereo surround sound effect and allowing them to feel the impact and depth of the bass, ensuring that the listener has a good sound reproduction experience.

[0042] It should be noted that the combined audio system provided in this application does not involve improvements to the circuit structure. Therefore, the embodiments in this application are not specifically described, and those skilled in the art can design corresponding circuit structures in conjunction with existing technologies.

[0043] Based on the above preferred solutions, the modular audio system has at least the following beneficial effects:

[0044] (1) Since the active speaker is only used to generate mid-to-high frequency sound waves, the wavelength of mid-to-high frequency sound waves is short and the required diaphragm area is small. Therefore, the active speaker in the preferred embodiment has a smaller speaker diaphragm size than that of a conventional active speaker, which can significantly reduce the volume of the entire active speaker and make it smaller than a conventional active speaker.

[0045] (2) The audio signal emitted by the audio source device can be received by the active speaker and the open-back headphones respectively, and is precisely divided into two frequency bands by the active speaker and the open-back headphones. The active speaker is only used to reproduce the mid and high frequencies, and the open-back headphones are only used to reproduce the bass frequencies. The two are audibly integrated into a complete sound, so that the listener can obtain a complete audio signal. It can not only achieve a stereo surround sound effect, but also take into account the bass performance, ensuring that the listener has a good sound reproduction experience.

[0046] (3) Since the mid-high frequencies are emitted by the active speakers, and the position of the active speakers is relatively fixed, the sound image of the mid-high frequencies is always consistent with the actual position of the active speakers. Generally, the mid-high frequencies are more easily used by the brain to judge the direction of the sound (compared to low-frequency signals). The mid-high frequencies emitted by the active speakers can provide the listener with a clear front sound image positioning. Even if the user wears open-back headphones and moves their head, the sound image of the mid-high frequencies is still fixed in the direction of the active speakers. Secondly, open-back headphones are only responsible for playing low-frequency signals, and low-frequency signals themselves are difficult to position accurately (because their wavelength is long and the time difference and intensity difference between the two ears are not obvious). Handing the low-frequency signals to open-back headphones can not only enhance the bass effect, but also avoid the bass from interfering with the sound image positioning, thus making the sound image more stable in front and not moving with the movement of the headphones.

[0047] It should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art, or the orientation or positional relationship that the product is usually placed in during use. It is only for the purpose of facilitating the description of this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0048] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

[0049] The present utility model patent has been described above with reference to the accompanying drawings. Obviously, the implementation of the present utility model patent is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present utility model patent, or the direct application of the inventive concept and technical solution of the present utility model patent to other occasions without modification, are all within the protection scope of the present utility model.

Claims

1. A combination sound system, characterized by, The application relates to an audio playing device. The first audio playing unit (1) is built-in with a first signal processing unit (11), and is used for receiving an audio signal sent by a sound source device; the first signal processing unit (11) performs high-pass filtering processing on the audio signal, so that the sound wave emitted by the first audio playing unit (1) is a medium-high frequency sound wave after high-pass filtering processing. The second audio playing unit (2) is built-in with a second signal processing unit (21), and is used for receiving an audio signal sent by a sound source device; the second signal processing unit (21) performs low-pass filtering processing on the audio signal, so that the sound wave emitted by the second audio playing unit (2) is a low frequency sound wave after low-pass filtering processing.

2. A combination audio system as defined in claim 1, wherein: The first audio playing unit (1) is an open earphone or an active sound box, and the second audio playing unit (2) is an open earphone or an active sound box.

3. A modular sound system as claimed in claim 2, wherein: When the first audio playing unit (1) is an active sound box, the first audio playing unit (1) is connected with the sound source device in a wired communication mode or a wireless communication mode; when the first audio playing unit (1) is an open earphone, the first audio playing unit (1) is connected with the sound source device in a wireless communication mode.

4. The combination audio system of claim 2, wherein: When the second audio playing unit (2) is an active sound box, the second audio playing unit (2) is connected with the sound source device in a wired communication mode or a wireless communication mode; when the second audio playing unit (2) is an open earphone, the second audio playing unit (2) is connected with the sound source device in a wireless communication mode.

5. A modular sound system as claimed in any one of claims 3 to 4, wherein: The wireless communication mode is Bluetooth wireless communication or 2.4G wireless communication.

6. The combination audio system of claim 1, wherein: The first signal processing unit (11) is a high-pass filtering processor.

7. The combination audio system of claim 1, wherein: The second signal processing unit (21) is a low-pass filtering processor.

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