CN2681504Y - Multimedia sound box with VHF and UHF frequency modulation circuit - Google Patents
Multimedia sound box with VHF and UHF frequency modulation circuit Download PDFInfo
- Publication number
- CN2681504Y CN2681504Y CN 200420011664 CN200420011664U CN2681504Y CN 2681504 Y CN2681504 Y CN 2681504Y CN 200420011664 CN200420011664 CN 200420011664 CN 200420011664 U CN200420011664 U CN 200420011664U CN 2681504 Y CN2681504 Y CN 2681504Y
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- CN
- China
- Prior art keywords
- vhf
- frequency
- sound box
- antenna
- audio amplifier
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a multimedia sound box with VHF and UHF frequency modulation circuit belonging to a stereo sound device of the electricity. The multimedia sound box with VHF and UHF frequency modulation circuit is composed of an active sound box, a VHF and UHF frequency modulation circuit, an antenna and an ear microphone. A frequency adjustment ejector is arranged in the sound box. A conducting wire is used for connecting the input terminal of the frequency adjustment ejector and a mainframe sound card and is connected with the connecting line of the input terminal of the amplifier in the active sound box. The output terminal of the VHF and UHF frequency modulation circuit is connected with the antenna fixed on the wall of the sound box. After the frequency of the incoming signal source is adjusted, the incoming signal source is emitted through the antenna. The signal emitted by the antenna is received by the frequency adjustment ear microphone. After the signal is adjusted, the signal is restored to a stereo sound signal sent to the people's ears. The power of the frequency adjustment ejector is from the power of the transformer in the active sound box. That is to say, the 6v direct current power supply supplies electricity. The multimedia sound box with VHF and UHF frequency modulation circuit has the advantage of wireless listening. The ear microphone has the characteristic of broad frequency, which can reinforce the requirement of high-fidelity for the people.
Description
Technical field
The utility model belongs to the stereo in the electricity, and what be specifically related to is the multimedia loudspeaker box that has VHF, UHF frequency modulator
Background technology
Active audio amplifier in the past all is by lead the audio signal of main frame or sound card to be transported to audio amplifier.Being main frame or sound card,---active audio amplifier stereo amplifier---divides to left and right sides audio amplifier (R sound channel) (L sound channel).The person of listening to the music to be in audio amplifier pronunciation pleasant to hear within, and hearer position difference, acoustics differs greatly, make and listen to the music and move freely generation contradiction, the sound that the while audio amplifier sends all is the recipient in the scope that the people can hear, thereby can causes impairment to the non-hearer of being subjected to.
Summary of the invention
The purpose of this invention is to provide a kind of VHF of application, UHF frequency modulation technology to remove the constraint of audio amplifier to the people present position, realize not being subjected to whether to have between people and the audio amplifier influence of voice disorder, move, displacement, and do not influence other people appreciation clear stereo sound equipment
The utility model is made up of active audio amplifier, VHF, UHF FM circuit, antenna, headset, the annexation of each parts is that frequency-modulated transmitter is installed in the audio amplifier, the input and the main frame sound card that connect frequency-modulated transmitter with lead are delivered to amplifier input terminal line in the active audio amplifier, the output termination antenna of VHF, UHF FM circuit, antenna is fixed on the audio amplifier wall.Input signal source frequency modulation, is reduced to stereophonic signal and delivers to people's ear with the signal that the frequency modulation headset comes reception antenna to send after antenna is launched (frequency range 433-434) after the demodulation.The volume of active audio amplifier can be controlled voluntarily by itself, and the headset volume is reconciled by the volume on the headset and controlled, and the frequency-modulated transmitter power supply is taken from the i.e. 6 ∨ DC power supply of the interior transformer frequency response of active audio amplifier.
Good effect of the present utility model is not change its effects,sound simultaneously, increase the randomness of the person, and realize the accessible MP3 voice signal of listening to downloaded, realize that the wireless advantage of listening to, headset have the wide characteristic of its frequency, thereby more can increase the dynamic intensity of music, make the people personalized more when the enjoyment music, help people's selecting property more, more can strengthen the demand of people high-fidelity.
Description of drawings
Accompanying drawing is the utility model overall structure schematic diagram.
Concrete enforcement
At first selecting for use Hui Wei to produce the SBHC frequency modulation headset one that VHF-AF-200, VHF-900, AF-2000 wireless frequency modulation headset or Dutch Philip that M one 20W active audio amplifier (Hui Wei produce serial audio amplifier such as M one 20W all can) and the refined electron rich in Foshan company produce produce overlaps.In the audio amplifier 1 that has amplifying circuit, install former and the supporting frequency-modulated transmitter 2 of headset, main frame sound card signal is transferred to the external connection terminal post of active audio amplifier 1 with line, be connected to the input of active audio amplifier amplifier 3 again through lead, the input and the main frame sound card that connect frequency-modulated transmitter 2 with lead are delivered to amplifier input terminal in the active audio amplifier 1, the output termination antenna 4 of VHF, UHF FM circuit, antenna 4 is fixed on the audio amplifier wall.Input signal source frequency modulation, is reduced to stereophonic signal and delivers to people's ear with the signal that frequency modulation headset 5 comes reception antenna 4 to send after antenna 4 is launched (frequency range 433-434) after the demodulation.The volume of active audio amplifier 1 can be controlled voluntarily by itself, and headset 5 volumes are reconciled by the volume on the headset and controlled, and is the output of 6 ∨ DC power supply with transformer frequency response in lead connection frequency-modulated transmitter 2 supply terminalss and the active audio amplifier 1.The frequency modulator power supply is taken from the DC power supply of active audio amplifier power amplifier after lead connects.
Claims (1)
1, the multimedia loudspeaker box that has VHF, UHF FM circuit, it is characterized in that: form by active audio amplifier (1), VHF, UHF FM circuit (2), antenna (4), headset (5), the annexation of each parts is that the frequency-modulated transmitter (2) that the first wife is enclosed within on the headset is installed in the audio amplifier (1), connect the input of frequency-modulated transmitter (2) and the input that the main frame sound card is delivered to amplifier (3) in the active audio amplifier with lead, the output termination antenna (4) of VHF, UHF FM circuit, antenna (4) is fixed on the wall of audio amplifier (1).Input signal source frequency modulation is after antenna emission (frequency range 433-434), the signal that comes reception antenna to send with frequency modulation headset (5), be reduced to stereophonic signal after the demodulation and deliver to people's ear, the volume of active audio amplifier can be controlled voluntarily by itself, the headset volume is reconciled by the volume on the headset and is controlled, and it is the 6V DC power supply that the frequency-modulated transmitter power supply is taken from the interior transformer frequency response of active audio amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420011664 CN2681504Y (en) | 2004-03-15 | 2004-03-15 | Multimedia sound box with VHF and UHF frequency modulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420011664 CN2681504Y (en) | 2004-03-15 | 2004-03-15 | Multimedia sound box with VHF and UHF frequency modulation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2681504Y true CN2681504Y (en) | 2005-02-23 |
Family
ID=34606225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420011664 Expired - Fee Related CN2681504Y (en) | 2004-03-15 | 2004-03-15 | Multimedia sound box with VHF and UHF frequency modulation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2681504Y (en) |
-
2004
- 2004-03-15 CN CN 200420011664 patent/CN2681504Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |