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FAQ
Q
What causes a buzzing noise in a wireless microphone?
A
1. The microphone may be faulty and affect the proper current supply. 2. Do not share the same socket for AC appliances with other devices.
Q
What is the frequency difference for wireless microphones to avoid interference?
A
This depends on the situation, but at least 4MHz is required. We cannot answer this question definitively here, as it involves complex calculations. Generally, cheaper wireless systems require a larger frequency gap because their receivers are simply designed and have fewer options, which limits the number of compatible channels. Higher-priced systems have better filtering, with closer distances between channels, allowing for more compatible channels. If we say 'you don't want to do the calculations yourself,' that would definitely be correct. If you need assistance, please contact the manufacturer or agent, and they will help you with the calculations. Most manufacturers have already calculated the compatible frequencies for each wireless feature of Shure, so you don't need to do these tedious mathematical calculations yourself.
Q
UHF is better than VHF, right?
A
These two frequency bands used for wireless microphones have their own advantages and disadvantages. This is determined by the users of the frequency bands, the physical characteristics of the bands, and the limits of regulation. Here are several aspects in which UHF is superior to VHF: 1) The UHF band is not as 'crowded' as the VHF band. 2) The frequency flexibility of UHF allows for a wider range of use. 3) UHF characteristics can provide more compatible systems. [For example, the Shure LX and SCVHF band systems can only provide 12 compatible channels, while Shure's UHF band system can provide over 100 compatible channels.] 4) The power output of UHF systems is higher than that of VHF, with a wider frequency shift, better dynamic range, and a superior signal-to-noise ratio compared to VHF. Several aspects in which VHF is superior to UHF: 1) VHF systems are cheaper. 2) VHF has a larger transmission range at a specified transmission power. 3) VHF signal propagation is effective even through non-metallic substances. The longer wavelength of VHF is less likely to be absorbed by the human body.
Q
Precautions for Using Wireless Microphones in the Conference System
A
Precautions for using wireless microphones (How to use wireless microphones correctly): First point: Do not hold the mesh head of the wireless microphone while using it, as all microphones have a certain directionality in their pickup parts. Holding the mesh part will change the microphone's directionality and frequency response, and due to the gathering effect of the palm, it can cause feedback, howling, and other issues. Second point: Do not hold the antenna transmission part of the microphone. Generally, for handheld microphones, the transmission circuit and antenna are located at the lower part of the microphone (away from the pickup end). When the hand touches the antenna part, most of the RF energy is lost because it cannot enter the air, reducing the operating range of the wireless system and affecting reception quality. Third point: Holding two wireless microphones in one hand is a serious mistake. When two or more wireless microphones are close together, it can cause high-frequency harmonic interference, and more seriously, it can create audio phase and directionality interference, damaging the original sound quality characteristics of the microphones. Fourth point: Avoid 'kissing' the microphone. When using a handheld wireless microphone, the distance between the microphone and the mouth should generally be kept at 5-10 cm. If too close, it will produce proximity effect; if too far, the sound will be very faint, both of which will damage sound quality. When using a lapel microphone, prevent it from being too far from the mouth and try to keep it close; when using a headset microphone, avoid having the mouth directly facing the microphone head to prevent the impact of airflow. Fifth point: Avoid using the wireless microphone facing the speaker. If the microphone is directly pointed at the speaker, it creates a closed loop for the entire system, resulting in positive feedback (howling), which must be avoided. Sixth point: During sound testing, avoid tapping the microphone or blowing into it. The pickup part of the microphone is quite delicate, and the components are very fragile. Tapping the microphone or blowing into the pickup can easily cause damage or misalignment of components, ultimately affecting sound quality. These are the points to pay attention to when using wireless microphones, whether in meetings or concerts. If used improperly, it can greatly damage the microphone's lifespan, so everyone should be careful!
Q
What are the characteristics of a digital wireless conference control system?
A
1. The digital conference system uses all-digital transmission, resulting in clearer sound quality; 2. It has functions for discussion speaking, voting, and sign-in, with the chairman unit having priority speaking rights; 3. Supports four speaking modes: first-come-first-served, normal mode, voice control mode, and application for speaking! 4. A single unit supports 128 conference units, and with an expansion host, it can be expanded to 4096 units; 5. The number of simultaneous speakers can be preset, supporting options for 1/2/4/8 speakers; 6. The host comes with a fire linkage interface, which can connect with fire safety systems to alert about fire information; 7. Sound quality supports long-distance transmission, and the host is equipped with optical audio interfaces and CobraNet protocol transmission interfaces; 8. Supports control via wireless touch screens, Android system computers, and mobile phones; 9. The host has built-in camera tracking functionality and can also work with a tracking host to achieve camera tracking functionality.
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