CN220067635U

CN220067635U - Distributed type sound amplifying wireless microphone

Info

Publication number: CN220067635U
Application number: CN202320676472.3U
Authority: CN
Inventors: 谢璐; 王磊; 李家迪; 杨光义
Original assignee: Wuhan University WHU
Current assignee: Wuhan University WHU
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-11-21
Anticipated expiration: 2033-03-30

Abstract

The utility model discloses a distributed sound amplifying wireless microphone, which comprises a wireless microphone transmitter and a plurality of relay sound amplifying devices, wherein the wireless microphone transmitter and the plurality of relay sound amplifying devices are arranged in a sound amplifying scene in a surrounding distribution manner, and the wireless microphone transmitter is used for transmitting a carrier frequency modulation signal; the relay amplifying devices are used for receiving and demodulating the amplified carrier frequency modulation signals, modulating the demodulated and amplified signals again to obtain other carrier frequency modulation signals corresponding to the relay amplifying devices, and sending the carrier frequency modulation signals outwards; when the signal intensity received by any one of the relay amplifying devices is lower than a preset threshold value, the corresponding relay amplifying device automatically searches channels again for the preset frequency points of each relay amplifying device, and when the effective frequency points are searched, the corresponding carrier frequency modulation signals are received, demodulated, amplified and played. The wireless microphone provided by the utility model has the advantages of good flexibility, high stability, uniform surrounding distribution of sound and large coverage area.

Description

Distributed type sound amplifying wireless microphone

Technical Field

The utility model relates to the technical field of wireless microphones, in particular to a distributed sound amplifying wireless microphone.

Background

At present, the sound amplifying microphone is widely applied to various different occasions such as teaching, conferences and performances. For users, the use of a wired microphone can be limited by a line, and the flexibility is poor; the wireless microphone is not limited by a circuit, the flexibility is good, but the existing wireless microphone often has the problems of unstable connection of a transmitter and a receiver and the like, and the voice interruption is easy to cause.

In addition, if a single sound amplifying device is used, there is a problem that sound is unevenly distributed in space and the coverage area is small, sound heard by a listener close to the sound amplifying device is noise-harsher, and sound heard by a listener far from the sound amplifying device is small and may be difficult to distinguish, so that the listener's feeling is very affected. Therefore, a wireless microphone with good flexibility, high stability, uniform sound distribution and large coverage area needs to be designed.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. It is therefore an object of the present utility model to provide a distributed amplified wireless microphone having the advantages of good flexibility, high stability, uniform sound surround distribution and large coverage area.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

a distributed amplified wireless microphone, comprising:

the wireless microphone transmitter and the relay amplifying devices are distributed in a surrounding mode and arranged in an amplifying scene, and the wireless microphone transmitter is used for transmitting a carrier frequency modulation signal; the relay amplifying devices are used for receiving, demodulating and amplifying the carrier frequency modulation signals, modulating the demodulated and amplified signals again to obtain other carrier frequency modulation signals corresponding to the relay amplifying devices, and sending the carrier frequency modulation signals outwards; wherein,

when the signal intensity received by any one of the relay amplifying devices is lower than a preset threshold value, the corresponding relay amplifying device automatically searches channels again for the preset frequency points of each relay amplifying device, and when the effective frequency points are searched, the corresponding carrier frequency modulation signal is received, demodulated, amplified and played.

Optionally, the wireless microphone transmitter includes a microphone module for collecting a microphone input signal and processing the microphone input signal to obtain a baseband signal.

Optionally, the wireless microphone transmitter further includes:

the first transmitter main control module is connected with the microphone module and used for modulating the baseband signal and transmitting the modulated carrier frequency modulation signal.

Optionally, the wireless microphone transmitter further includes:

the first transmitter configuration module is connected with the first transmitter main control module and is used for configuring ID information and frequency points corresponding to the wireless microphone transmitter so that the first transmitter main control module can obtain corresponding carrier frequency modulation signals according to the ID information and the frequency points.

Optionally, the wireless microphone transmitter further includes:

the system comprises a first transmitter filter balun module and a narrow-band antenna which are sequentially connected, wherein the first transmitter filter balun module is connected with a first transmitter main control module and is used for filtering low-frequency and direct-current signals and realizing signal conversion of an unbalanced end and a balanced end.

Optionally, each of the relay amplifying devices includes: the wireless microphone comprises a wireless microphone transmitter and other relay amplifying equipment, a broadband antenna and a duplexer, wherein the duplexer comprises a band-stop filter and a band-pass filter, the band-stop filter is connected with one end of the band-pass filter, and the broadband antenna is used for receiving carrier frequency modulation signals sent by the wireless microphone transmitter and other relay amplifying equipment or sending carrier frequency modulation signals modulated by the wireless microphone transmitter; the duplexer is used for isolating a self receiving channel and a transmitting channel.

Optionally, each of the relay amplifying devices further includes:

the receiver balun is connected with the other end of the band-stop filter and is used for filtering low-frequency and direct-current signals and realizing signal conversion between an unbalanced end and a balanced end;

the receiver main control module is connected with the receiver balun and is used for automatically controlling the corresponding relay amplifying equipment to search the channels again when the received signal strength is lower than the signal strength threshold value for searching the channels again, and demodulating and amplifying the received signal when the received signal strength is higher than the signal strength threshold value for confirming the reception;

the receiver configuration module is connected with the receiver main control module and is used for configuring a signal intensity threshold value for re-searching channels and a signal intensity threshold value for confirming receiving, and configuring the receiver main control module so as to enable the corresponding relay public address equipment to enter a self-defined searching state of each frequency point.

Optionally, each of the relay amplifying devices further includes:

the audio power amplification unit is connected with the receiver main control module and used for driving the loudspeaker to play the signal demodulated and amplified by the receiver main control module.

Optionally, each of the relay amplifying devices further includes:

the second transmitter main control module is connected with the audio power amplification unit and is used for modulating the demodulated and amplified signal again and transmitting carrier frequency modulation signals of corresponding frequency points;

the second transmitter configuration module is connected with the second transmitter main control module and is used for configuring ID information and frequency points corresponding to the relay amplifying equipment so as to enable the second transmitter main control module to modulate and obtain carrier frequency modulation signals corresponding to the relay amplifying equipment;

and the second transmitter filtering balun module is respectively connected with the second transmitter main control module and the other end of the band-pass filter, and is used for filtering low-frequency and direct-current signals and realizing signal conversion of an unbalanced end and a balanced end.

Optionally, the first transmitter main control module and the second transmitter main control module are KT0641 type chips, and the receiver main control module is KT0651 type chips.

The utility model has at least the following technical effects:

the distributed public address wireless microphone comprises a wireless microphone transmitter and a plurality of relay public address devices, wherein the wireless microphone transmitter can be used for transmitting a carrier frequency modulation signal, the plurality of relay public address devices can be used for receiving, demodulating and amplifying the carrier frequency modulation signal, modulating the demodulated and amplified signal again to obtain other plurality of carrier frequency modulation signals corresponding to the relay public address devices and sending the carrier frequency modulation signals outwards, when the received signal intensity of any one relay public address device is lower than a preset threshold value, the corresponding relay public address device automatically searches channels again for the frequency point of each preset relay public address device, and when the effective frequency point is searched, the corresponding carrier frequency modulation signal is received, demodulated, amplified and played, so that the sound distribution uniformity of the wireless microphone can be improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic diagram of the working principle of a distributed amplifying wireless microphone according to an embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of a wireless microphone transmitter according to an embodiment of the utility model.

Fig. 3 is a schematic circuit diagram of a microphone module according to an embodiment of the utility model.

Fig. 4 is a schematic circuit diagram of a first transmitter main control module according to an embodiment of the utility model.

Fig. 5 is a schematic circuit diagram of a first transmitter configuration module according to an embodiment of the utility model.

Fig. 6 is a schematic circuit diagram of a first transmitter filter balun module according to an embodiment of the present utility model.

Fig. 7 is a schematic structural diagram of a relay amplifying device according to an embodiment of the present utility model.

Fig. 8 is a schematic circuit diagram of a duplexer according to an embodiment of the present utility model.

Fig. 9 is a schematic circuit diagram of a receiver balun according to an embodiment of the present utility model.

Fig. 10 is a schematic circuit diagram of a receiver main control module according to an embodiment of the utility model.

Fig. 11 is a schematic circuit diagram of a receiver configuration module according to an embodiment of the utility model.

Fig. 12 is a schematic circuit diagram of an audio power amplifier unit according to an embodiment of the utility model.

Detailed Description

The present embodiment is described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A distributed-type amplified wireless microphone of the present embodiment is described in detail below.

The distributed public address wireless microphone of the embodiment comprises a wireless microphone transmitter and a plurality of relay public address devices, wherein the wireless microphone transmitter and the plurality of relay public address devices are distributed in a public address scene in a surrounding mode, and the wireless microphone transmitter is used for transmitting a carrier frequency modulation signal; the relay amplifying devices are used for receiving and demodulating the amplified carrier frequency modulation signals, modulating the demodulated and amplified signals again to obtain other carrier frequency modulation signals corresponding to the relay amplifying devices, and sending the carrier frequency modulation signals outwards; when the signal intensity received by any one of the relay amplifying devices is lower than a preset threshold value, the corresponding relay amplifying device automatically searches channels again for the preset frequency points of each relay amplifying device, and when the effective frequency points are searched, the corresponding carrier frequency modulation signals are received, demodulated, amplified and played. Wherein the number of relay loudspeaker devices may be as desired.

In this embodiment, after the wireless microphone transmitter performs processing such as pickup, modulation, amplification, etc. on the sound signal, a radio frequency modulated signal with a certain carrier frequency can be transmitted, i.e. a carrier frequency modulated signal is transmitted. In the initial situation, each relay amplifying device preferentially receives the signals from the wireless microphone transmitter, demodulates and amplifies the signals, plays sound signals through the loudspeaker, modulates the sound signals again, and transmits radio frequency modulated signals of other corresponding carrier frequencies, namely, transmits a plurality of other carrier frequency modulated signals. Wherein, the carrier frequencies, i.e. frequency points, of the signals transmitted by all the relay amplifying devices are different. When the original received signal intensity of a certain relay amplifying device is too low due to signal interference or too far distance, the relay amplifying device stops transmitting signals, meanwhile, frequency points of each preset relay amplifying device are automatically searched again, when effective frequency points are searched, carrier frequency modulation signals corresponding to the frequency points are received, demodulated and amplified, and a loudspeaker plays and modulates and transmits the carrier frequency modulation signals again.

Fig. 1 is a schematic diagram of the working principle of a distributed amplifying wireless microphone according to an embodiment of the present utility model. As shown in fig. 1, a distributed wireless microphone is formed by surrounding and distributing a wireless microphone transmitter 1 and a plurality of relay amplifying devices 2 a-2 d (for example, four devices) in a surrounding manner, wherein the wireless microphone transmitter 1 transmits a radio frequency modulated signal f1 containing a sound signal, the relay amplifying devices 2 a-2 d receive the signal f1 preferentially under the initial condition, demodulate and amplify the signal and modulate the signal again, and respectively transmit the radio frequency modulated signal f2 a-f 2d containing the sound signal, and when the intensity of the received original received signal is too low due to signal interference of a certain relay amplifying device such as the relay amplifying device 2a, the relay amplifying device can automatically re-search for an effective frequency point from the signal f2 b-f 2d, namely, a signal corresponding to a larger value of search signal intensity is received.

Fig. 2 is a schematic structural diagram of a wireless microphone transmitter according to an embodiment of the utility model. As shown in fig. 2, the wireless microphone transmitter includes a microphone module, a first transmitter main control module, a first transmitter filtering balun module, and a narrowband antenna, which are sequentially connected, and a first transmitter configuration module connected with the first transmitter main control module. The microphone module is used for collecting microphone input signals and processing the microphone input signals to obtain baseband signals. The first transmitter main control module is used for modulating the baseband signal and transmitting the modulated carrier frequency modulation signal. The first transmitter configuration module is used for configuring ID information (identity information) and frequency points corresponding to the wireless microphone transmitter, so that the first transmitter main control module obtains corresponding carrier frequency modulation signals according to the ID information and the frequency points. The first transmitter filtering balun module is used for filtering low-frequency and direct-current signals and realizing unbalanced terminal and balanced terminal signal conversion. The narrow-band antenna is used for transmitting the carrier frequency modulation signal processed by the first transmitter filter balun module.

In this embodiment, the microphone module is composed of a microphone and a preamplifier, and functions to pick up sound, amplify power, and transform impedance to obtain a baseband signal.

Fig. 3 is a schematic circuit diagram of a microphone module according to an embodiment of the utility model. As shown in fig. 3, the microphone module refers to a KT0641 (chip model) chip recommendation circuit, which is connected by an electret condenser microphone and a common collector amplifying circuit, and is connected to a microphone signal input end, i.e., MIC INP end and MIC INN end, of a first transmitter master control module, i.e., KT0641 chip.

In this embodiment, the first transmitter main control module is a KT0641 wireless microphone transmitting module, and is configured to superimpose a baseband signal and a pilot signal of a digital auxiliary channel, modulate the obtained signal with a carrier signal of a certain frequency, and perform power amplification processing on the radio frequency modulated signal, where the digital auxiliary channel circularly transmits ID information and frequency point information, and enter a mute state when detecting that the amplitude of the baseband signal is too low, and stop transmitting the radio frequency signal, i.e. stop transmitting the carrier frequency modulated signal.

Fig. 4 is a schematic circuit diagram of a first transmitter main control module according to an embodiment of the utility model. As shown in FIG. 4, the first transmitter main control module adopts KT0641 chip reference design, has the characteristics of full integration, professional level tone quality, soft silence, low power consumption, small volume and the like, and can adopt a frequency modulation mode to input signals, namely MIC INP endModulating with MICINN end input signal, transmitting UHF (ultra high frequency) band radio frequency signal of 470-960 MHz, detecting digital auxiliary channel, microphone audio input signal, frequency modulation bandwidth adjustable, transmitting power adjustable, battery voltage detecting alarm and other advanced functions, and passing I ² The C (synchronous serial bus) interface is configured with an external MCU (microprocessor). As shown in fig. 4, the first transmitter master module may modulate and transmit carrier frequency modulation signals via pins 15 and 16.

In this embodiment, the first transmitter configuration module may be an MCU, and functions through I ² And C, configuring KT0641, namely a first transmitter main control module.

Fig. 5 is a schematic circuit diagram of a first transmitter configuration module according to an embodiment of the utility model. As shown in FIG. 5, the first transmitter configuration module may employ an MSP430G2553IPW20 (Single chip microcomputer model) single chip microcomputer, which may pass through a JTAG interface (debug interface), an SBW interface (debug interface) and hardware I ² C interface and the like for on-line simulation and programming and can pass through I ² The C interface configures the KT0641 chip as in the SDA (data signal line) interface and the SCL (clock line) interface of fig. 5. In this embodiment, KT0641 needs to be configured to circularly transmit the ID information and the sequence value corresponding to the frequency point through the digital auxiliary channel.

In this embodiment, the first transmitter filter balun module adopts an LC (inductance capacitance) high pass filter and an LC balun, which are used to filter out low frequency and direct current signals, so as to implement impedance transformation and signal unbalanced end-balanced end conversion.

Fig. 6 is a schematic circuit diagram of a first transmitter filter balun module according to an embodiment of the present utility model. As shown in fig. 6, the first transmitter filtering balun module adopts a KT0641 peripheral circuit reference design, and can effectively filter out low-frequency and direct-current signals, perform impedance matching, realize that the output balance end of KT0641 is turned into a monopole narrowband antenna or an unbalanced end of a bandpass filter of a duplexer below, and convert and output carrier frequency modulation signals output by the output ends RFOUTN and RFOUTP of the first transmitter main control module into NAR ANT signals (signals transmitted by the wireless microphone transmitter) in fig. 6.

Fig. 7 is a schematic structural diagram of a relay amplifying device according to an embodiment of the present utility model. As shown in fig. 7, each of the repeater loudspeaker devices includes a wideband antenna, a duplexer, a receiver balun, a receiver main control module, a receiver configuration module, an audio power amplification unit, a speaker, a second transmitter main control module, a second transmitter configuration module, and a second transmitter filtering balun module.

The duplexer comprises a band-stop filter and a band-pass filter, wherein one end of the band-stop filter is connected with one end of the band-pass filter, and the broadband antenna is used for receiving carrier frequency modulation signals sent by the wireless microphone transmitter and other relay amplifying equipment or sending carrier frequency modulation signals modulated by the wireless microphone transmitter and other relay amplifying equipment; the diplexer is used to isolate the receive channel from the transmit channel itself. The receiver balun is connected with the other end of the band-stop filter and is used for filtering low-frequency and direct-current signals and realizing signal conversion between an unbalanced end and a balanced end. The receiver main control module is connected with the receiver balun and is used for automatically controlling the corresponding relay amplifying equipment to search the channels again when the received signal strength is lower than the signal strength threshold value for searching the channels again, and demodulating and amplifying the received signal when the received signal strength is higher than the signal strength threshold value for confirming the reception. The receiver configuration module is connected with the receiver main control module and is used for configuring the signal intensity threshold value of the re-channel searching and the signal intensity threshold value of the confirmation receiving, and configuring the receiver main control module so as to enable the corresponding relay public address equipment to enter the self-defined searching state of each frequency point. The audio power amplification unit is connected with the receiver main control module and used for driving the loudspeaker to play the signal demodulated and amplified by the receiver main control module.

The second transmitter main control module is connected with the audio power amplification unit and is used for modulating the demodulated and amplified signal again and transmitting carrier frequency modulation signals of corresponding frequency points; the second transmitter configuration module is connected with the second transmitter main control module and is used for configuring ID information and frequency points corresponding to the relay amplifying equipment so as to enable the second transmitter main control module to modulate and obtain carrier frequency modulation signals corresponding to the relay amplifying equipment; the second transmitter filtering balun module is respectively connected with the second transmitter main control module and the other end of the band-pass filter and is used for filtering low-frequency and direct-current signals and realizing signal conversion of an unbalanced end and a balanced end.

In this embodiment, the diplexer is composed of a band-stop filter and a band-pass filter, the insertion loss of the band-stop filter and the band-pass filter are small, the isolation degree is high, one end of the band-stop filter and the other end of the band-stop filter are connected to the balun of the receiver, and the other end of the band-pass filter is connected to the balun module of the second transmitter. In particular, the function of the band reject filter is to reject the coupling of the device's own transmit signal to its own receive channel, preventing the power of the coupled transmit signal from saturating the receive channel, while still being able to normally receive signals from other devices. The band-pass filter has the function that the receiving frequency signal does not generate intermodulation interference to the transmitting channel, and the transmitting channel does not influence normal signal reception due to noise power on the receiving frequency coupled to the receiving channel in an out-of-band stray manner, and meanwhile, normal transmitting signals can still be ensured.

Fig. 8 is a schematic circuit diagram of a duplexer according to an embodiment of the present utility model. As shown in fig. 8, the broadband antenna may receive the NAR ANT signal, the received signal is the WD ANT signal, and then input it to the duplexer and output the RFIN signal (duplexer output signal).

Fig. 9 is a schematic circuit diagram of a receiver balun according to an embodiment of the present utility model. As shown in fig. 9, the receiver balun adopts a KT0651 (chip model) peripheral circuit reference design, specifically adopts an LC high-pass filter and an LC balun, can effectively filter low-frequency and direct-current signals, performs impedance matching, and can then realize signal conversion of an unbalanced terminal and a balanced terminal. In fig. 9, the diplexer output signal, i.e., RFIN signal, is input to the receiver balun and the receiver balun output signal is output through the receiver balun output terminals, i.e., RFINP terminal and RFINN terminal.

In this embodiment, the receiver main control module is a KT0651 wireless microphone receiving module, which has the characteristics of full integration, professional performance, low power consumption, small volume, and the like, and can perform fm demodulation on the UHF band radio frequency signals of 470 MHz-960 MHz, and in additionThe system can customize a plurality of advanced functions such as 50 frequency points at most, transmitter ID pairing, automatic searching effective station, battery voltage detection alarm, automatic mute and the like, and has the functions of amplifying the received carrier frequency modulation signal with low noise, searching from the radio frequency signals of the corresponding frequency points of each relay amplifying device, demodulating and amplifying the received carrier frequency modulation signal after the frequency points reach the frequency points with the confirmed received signal strength threshold and consistent ID information. And automatically searching the frequency point again when the intensity of the received signal is continuously smaller than the signal intensity threshold value of the re-searching channel. The receiver main control module can pass through I ² And C, automatically reading the configuration information of the receiver configuration module by communication.

Fig. 10 is a schematic circuit diagram of a receiver main control module according to an embodiment of the utility model. As shown in fig. 10, after the receiver balun output signals output by the RFINP and the RFINN terminals are input to the receiver main control module KT0651, the AOUTP and AOUTN signals may be obtained by demodulation.

Fig. 11 is a schematic circuit diagram of a receiver configuration module according to an embodiment of the utility model. As shown in FIG. 11, the receiver configuration module may employ a 128Kbits 24LC128 memory, and the receiver main control module KT0651 may pass through I ² The C interface, i.e. interface 5 and interface 6 in fig. 11, reads its stored configuration information for configuration. In this embodiment, KT0651 of each relay amplifying device may be configured to a custom search frequency state, the number of searched frequency points is consistent with the number of all relay amplifying devices, the correspondence between a sequence value and a frequency point is consistent with the correspondence between a transmitting frequency point and a sequence value of each relay amplifying device KT0641, a signal intensity threshold for confirming reception and re-searching is configured, and an automatic mute indication pin, i.e. an autonomous pin, is further configured to be high-level to indicate mute.

In this embodiment, the audio power amplifier unit adopts a D-type digital power amplifier, which is used for amplifying the sound signal demodulated by the receiver main control module, then driving the speaker to play, and simultaneously, efficiently outputting the amplified sound signal to the baseband signal input port of the second transmitter main control module of the relay amplifying device, then modulating the amplified sound signal again to obtain the carrier frequency modulation signal of the corresponding frequency point, and outputting the signal after the filter impedance transformation, namely the RFOUT signal in fig. 6, through the second transmitter filter balun module, and then outputting the signal after the filter impedance transformation to the band-pass filter in the duplexer in fig. 8, and then transmitting the modulated signal again from the broadband antenna.

Fig. 12 is a schematic circuit diagram of an audio power amplifier unit according to an embodiment of the utility model. As shown in fig. 12, the audio power amplifier unit adopts a CS8126S type digital power amplifier, and uses a transistor to open, drain and output a pull-up resistor to realize automatic mute control of a KT0651 chip to switch off a pin, and the output end of the power amplifier does not need an LC filter, so as to directly drive a speaker with internal resistance of 4Ω (ohms), and meanwhile, after being divided and straightened, the output is output to a microphone input port of a KT0641 chip of a relay amplifying device, namely a baseband signal input port of a second transmitter main control module.

It should be noted that, the circuit structures of the second transmitter main control module, the second transmitter configuration module and the second transmitter filtering balun module are the same as those of the first transmitter main control module, the first transmitter configuration module and the first transmitter filtering balun module.

In the relay amplifying device, the second transmitter configuration module also needs to configure that baseband signal amplitude input by the microphone interface of the KT0641 chip is lower than a certain threshold value, and automatically mute, and stops transmitting radio frequency signals, so as to avoid that the receiver main control module KT0651 chip in the same device searches for radio frequency signals sent by the receiver main control module KT0651 chip in the channel searching process.

In summary, the distributed public address wireless microphone in the present utility model includes a wireless microphone transmitter and a plurality of relay public address devices, where the wireless microphone transmitter may be configured to transmit a carrier frequency modulation signal, the plurality of relay public address devices may be configured to receive and demodulate and amplify the carrier frequency modulation signal, and modulate the demodulated and amplified signal again to obtain a plurality of other carrier frequency modulation signals corresponding to each relay public address device and send the signals to the outside, when the signal intensity received by any one relay public address device is lower than a preset threshold, the corresponding relay public address device automatically re-searches the frequency point of each pre-configured relay public address device, and when the effective frequency point is searched, receives the corresponding carrier frequency modulation signal, and performs demodulation, amplification and playing, thereby improving the uniformity of the sound distribution of the wireless microphone.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

While the present utility model has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the utility model. Many modifications and substitutions of the present utility model will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the utility model should be limited only by the attached claims.

Claims

1. A distributed amplified wireless microphone, comprising:

2. A distributed loudspeaker wireless microphone according to claim 1 wherein the wireless microphone transmitter comprises a microphone module for capturing microphone input signals and processing to obtain baseband signals.

3. The distributed loudspeaker wireless microphone of claim 2 wherein the wireless microphone transmitter further comprises:

4. A distributed loudspeaker wireless microphone according to claim 3 wherein the wireless microphone transmitter further comprises:

5. The distributed loudspeaker wireless microphone according to claim 4 wherein the wireless microphone transmitter further comprises:

6. The distributed amplified wireless microphone of claim 5, wherein each of the relay amplifying devices comprises: the wireless microphone comprises a wireless microphone transmitter and other relay amplifying equipment, a broadband antenna and a duplexer, wherein the duplexer comprises a band-stop filter and a band-pass filter, the band-stop filter is connected with one end of the band-pass filter, and the broadband antenna is used for receiving carrier frequency modulation signals sent by the wireless microphone transmitter and other relay amplifying equipment or sending carrier frequency modulation signals modulated by the wireless microphone transmitter; the duplexer is used for isolating a self receiving channel and a transmitting channel.

7. The distributed amplified wireless microphone of claim 6, wherein each of the relay amplifying devices further comprises:

8. The distributed amplified wireless microphone of claim 7, wherein each of the relay amplifying devices further comprises:

9. The distributed amplified wireless microphone of claim 8, wherein each of the relay amplifying devices further comprises:

10. The distributed loudspeaker wireless microphone of claim 9 wherein the first transmitter and second transmitter control modules are KT0641 model chips and the receiver control module is a KT0651 model chip.