Voice broadcast system
By designing multiple denoising modules and modulation modules in the voice broadcasting system, selecting specific frequency bands and performing signal denoising processing, the existing system has solved the problems of high noise, unstable connection and poor audio quality, and achieved high-quality voice Stable broadcast and multi-channel transmission.
Patent Information
- Application Number
- CN202323476178.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-20
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2033-12-20
AI Technical Summary
The existing voice broadcasting system has high noise, unstable connections and poor audio quality, especially in the case of multi-channel, the problem of cross-talk and cross-talk is prone to occur.
A voice broadcasting system was designed, including a transmitter and multiple receivers. The transmitter was equipped with multiple denoising modules and modulation modules. By selecting the target frequency band of 655MHz-690MHz, DC-DC isolation module and π-type filtering module are used. , magnetic bead filter module, audio isolation transformer and RC filter module perform signal denoising and modulation to ensure clean and stable transmission of audio signals.
Effectively reduce noise, improve audio quality, avoid the phenomenon of channel-linking under multiple channels, and realize stable voice broadcast in different rooms.
Smart Images
Figure CN222441708U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of intelligent equipment, in particular to a voice broadcasting system. Background Art
[0002] In recent years, the voice broadcast systems on the market have been noisy and can easily lead to unstable connections and poor audio quality if they encounter obstacles or are too far away. In addition, when there are many channels, the existing technology is also prone to cross-channel and crosstalk. Utility Model Content
[0003] Based on this, the purpose of the utility model is to provide a voice broadcast system to reduce noise, improve audio quality, and avoid the phenomenon of cross-channel under multi-channel.
[0004] In the first aspect, the utility model provides a voice broadcast system, which includes a transmitting end and multiple receiving ends; the transmitting end includes: an antenna, a frequency band dial switch, an audio interface, a first power interface, multiple denoising modules and a modulation module; the first power interface is used to receive an initial power signal; the audio interface is used to receive an initial audio signal; the frequency band dial switch is used to select a target frequency band of the initial audio signal, and the target frequency band is 655MHz-690MHz; the denoising module is used to filter the initial power signal, and is also used to denoise the initial audio signal to obtain a first audio signal; the modulation module is used to convert the first audio signal into a wireless signal; the antenna is used to send the wireless signal to the receiving end; each receiving end has a built-in receiving control board and a speaker, and the receiving control board is used to receive and demodulate the wireless signal to obtain a second audio signal; the speaker is used to play the second audio signal.
[0005] Furthermore, the multiple denoising modules include: a DC-DC isolation module, a π-type filter module, a magnetic bead filter module, an audio isolation transformer and an RC filter module.
[0006] Furthermore, the DC-DC isolation module and the π-type filter module are used to filter out power signal impurities in the initial power signal; the audio isolation transformer and the RC filter module are used to filter out audio signal impurities in the initial audio signal; and the magnetic bead filter module is used to filter out ground wire impurities in the initial power signal and the initial audio signal to obtain a first audio signal.
[0007] Furthermore, the power signal filtered by the π-type filter module is also used to provide power to the audio isolation transformer and the RC filter module.
[0008] Furthermore, the receiving ends are placed in different rooms.
[0009] Furthermore, the transmitting end further comprises a first fixing hole and an indicator light; one or more first fixing holes are provided for fixing the transmitting end; and the indicator light is used for indicating the working status of the transmitting end.
[0010] Furthermore, the receiving end is also provided with a second power interface and a second fixing hole; the second power interface is used to receive power; and one or more second fixing holes are provided for fixing the receiving end.
[0011] The embodiments of the present invention bring the following beneficial effects:
[0012] The utility model provides a voice broadcast system, including a transmitting end and multiple receiving ends; the transmitting end includes: an antenna, a frequency band dial switch, an audio interface, a first power interface, multiple denoising modules and a modulation module; the frequency band dial switch is used to select the target frequency band of the initial audio signal, and the target frequency band is 655MHz-690MHz; the denoising module is used to filter the initial power signal, and is also used to denoise the initial audio signal to obtain a first audio signal; the modulation module is used to convert the first audio signal into a wireless signal; the antenna is used to send the wireless signal to the receiving end; each receiving end has a built-in receiving control board and a speaker, and the receiving control board is used to receive and demodulate the wireless signal to obtain a second audio signal; the speaker is used to play the second audio signal. This technology can reduce noise, improve audio quality, and avoid the phenomenon of cross-channel under multi-channel.
[0013] Other features and advantages of the utility model will be described in the subsequent description, or some features and advantages can be inferred or determined without doubt from the description, or can be learned by implementing the above-mentioned technology of the utility model.
[0014] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the following specifically cites preferred implementation modes and describes them in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 A schematic diagram of a transmitting end provided in an embodiment of the utility model;
[0017] Figure 2 A schematic diagram of a receiving end provided by an embodiment of the utility model;
[0018] Figure 3 A schematic diagram of a denoising process provided by an embodiment of the utility model.
[0019] Icons: 1. Antenna; 2. Frequency band dip switch; 3. Audio interface; 4. First power interface; 5. Transmitter; 6. First fixing hole; 7. Indicator light; 8. Speaker; 9. Second power interface; 10. Second fixing hole; 11. Receiver; 21. DC-DC isolation module; 22. π-type filter module; 23. Magnetic bead filter module; 24. RC filter module; 25. Audio isolation transformer; 26. Modulation module. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example
[0022] In order to facilitate understanding of the embodiment of the present utility model, a voice broadcast system provided by the embodiment of the present utility model is first described. Figure 1 A schematic diagram of a transmitting end provided in an embodiment of the utility model; Figure 2 A schematic diagram of a receiving end provided by an embodiment of the utility model; Figure 3 A schematic diagram of a denoising process provided by an embodiment of the utility model.
[0023] The voice broadcast system of this embodiment includes a transmitting end 5 and multiple receiving ends 11;
[0024] The transmitting end 5 includes: an antenna 1, a frequency band dial switch 2, an audio interface 3, a first power interface 4, a plurality of denoising modules and a modulation module 26;
[0025] The first power interface 4 is used to receive an initial power signal;
[0026] The audio interface 3 is used to receive an initial audio signal;
[0027] The frequency band DIP switch 2 is used to select the target frequency band of the initial audio signal, and the target frequency band is 655MHz-690MHz;
[0028] The denoising module is used to filter the initial power signal and to denoise the initial audio signal to obtain a first audio signal;
[0029] The modulation module 26 is used to convert the first audio signal into a wireless signal;
[0030] Antenna 1 is used to send the wireless signal to a receiving end 11;
[0031] Each receiving end 11 has a built-in receiving control board and a speaker 8. The receiving control board is used to receive and demodulate the wireless signal to obtain a second audio signal; and the speaker 8 is used to play the second audio signal.
[0032] The multiple noise reduction modules include: a DC-DC isolation module 21 , a π-type filter module 22 , a magnetic bead filter module 23 , an audio isolation transformer 25 and an RC filter module 24 .
[0033] The DC-DC isolation module 21 and the π-type filter module 22 are used to filter out power signal impurities in the initial power signal;
[0034] The audio isolation transformer 25 and the RC filter module 24 are used to filter out audio signal impurities in the initial audio signal.
[0035] The magnetic bead filter module 23 is used to filter out ground wire impurities in the initial power signal and the initial audio signal to obtain a first audio signal.
[0036] It should be noted that the line for transmitting the power signal includes a power signal transmission line and a ground line, and the line for transmitting the audio signal includes an audio signal transmission line and a ground line. Current impurities in the power signal line and the two ground lines will affect the quality of the first audio signal, so all the above lines need to be filtered and isolated to truly obtain clean audio.
[0037] The power signal filtered by the π-type filter module 22 is also used to provide power to the audio isolation transformer 25 and the RC filter module 24 .
[0038] The receiving end 11 is placed in a different room.
[0039] The transmitting end 5 also includes a first fixing hole 6 and an indicator light 7;
[0040] The first fixing hole 6 is provided with one or more holes for fixing the transmitting end 5;
[0041] The indicator light 7 is used to indicate the working status of the transmitting end 5 .
[0042] The receiving end 11 is also provided with a second power interface 9 and a second fixing hole 10 ; the second power interface 9 is used to receive power; one or more second fixing holes 10 are provided for fixing the receiving end 11 .
[0043] The beneficial effects of this embodiment are as follows:
[0044] 1. Pass Figure 3 The denoising process can reduce the audio noise in standby and working states.
[0045] 2. By selecting the frequency band (the target frequency band is 655MHz-690MHz), the problem of unstable connection and poor audio quality when encountering obstacles or the distance is too far can be solved.
[0046] 3. By sending one signal to multiple receivers and selecting the appropriate target frequency band, crosstalk is less likely to occur when there are many channels.
[0047] 4. By sending one message to multiple receivers and placing the receiving terminal 11 in different rooms, it is possible to simultaneously broadcast specific information to multiple rooms and flexibly specify the playback content.
[0048] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0049] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A voice broadcast system, characterized in that: The voice broadcast system comprises a transmitting end (5) and a plurality of receiving ends (11); The transmitting end (5) comprises: an antenna (1), a frequency band dial switch (2), an audio interface (3), a first power interface (4), a plurality of denoising modules and a modulation module (26); The first power interface (4) is used to receive an initial power signal; The audio interface (3) is used to receive an initial audio signal; The frequency band dip switch (2) is used to select a target frequency band of the initial audio signal, wherein the target frequency band is 655 MHz-690 MHz; The denoising module is used to filter the initial power signal and to denoise the initial audio signal to obtain a first audio signal; The modulation module (26) is used to convert the first audio signal into a wireless signal; The antenna (1) is used to send the wireless signal to a receiving end (11); Each receiving end (11) has a built-in receiving control board and a speaker (8); the receiving control board is used to receive and demodulate the wireless signal to obtain a second audio signal; and the speaker (8) is used to play the second audio signal.
2. The voice broadcast system according to claim 1, characterized in that: The multiple noise removal modules include: a DC-DC isolation module (21), a π-type filter module (22), a magnetic bead filter module (23), an audio isolation transformer (25) and an RC filter module (24).
3. The voice broadcast system according to claim 2, characterized in that: The DC-DC isolation module (21) and the π-type filter module (22) are used to filter out power signal impurities in the initial power signal; The audio isolation transformer (25) and the RC filter module (24) are used to filter out audio signal impurities in the initial audio signal; The magnetic bead filter module (23) is used to filter out ground wire impurities in the initial power supply signal and the initial audio signal to obtain a first audio signal.
4. The voice broadcast system according to claim 3, characterized in that: The power signal filtered by the π-type filter module (22) is also used to provide electric energy for the audio isolation transformer (25) and the RC filter module (24).
5. The voice broadcast system according to claim 4, characterized in that: The receiving end (11) is placed in a different room.
6. The voice broadcast system according to claim 5, characterized in that: The transmitting end (5) further comprises a first fixing hole (6) and an indicator light (7); One or more first fixing holes (6) are provided for fixing the transmitting end (5); The indicator light (7) is used to indicate the working state of the transmitting end (5).
7. The voice broadcast system according to claim 6, characterized in that: The receiving end (11) is also provided with a second power supply interface (9) and a second fixing hole (10); The second power interface (9) is used to receive power; One or more second fixing holes (10) are provided for fixing the receiving end (11).