The microphone is a very important part of the multimedia classroom. Although it is simple to use and relatively inexpensive, it plays a decisive role. Microphones are one of the most frequently used devices in multimedia devices. If they are used improperly, their lifespan will be greatly reduced, which will affect the normal use of multimedia classrooms. Its maintenance should pay attention to the following common sense: 1. Install and remove the cable and microphone correctly. Insert the XLR plug (commonly known as the cassette head) into the microphone, rotate the plug so that the top button is aligned with the notch on the microphone, then push the plug into the microphone until the button is positioned; when the microphone and the cable are separated, you can hold it. Plug, hold down the press button at the same time, then pull the plug out of the microphone. Do not force access and separate operations without aligning or pressing the snap button.
2. The “whistling noise†appears in the microphone during use. This may be caused by the hand covering the microphone head or the microphone being too close to the loudspeaker. The correct solution is to first lower the volume and pull off the loudspeaker. Distance, try to avoid the microphone and loudspeaker, and then adjust to the appropriate volume.
3, the microphone is a high-sensitivity audio equipment, must pay attention to light and light to avoid falling from a height. Impact may cause the microphone sensitivity to decrease or even damage.
4. Do not blew the air on the microphone or tap on the head to test the sound. The correct method of audition is to point the microphone to speak normally.
5, push and pull the key to the microphone must pay attention to moderate strength, push and pull in place. If you find that there is a lot of noise during use, it may be caused by the fact that the switch key is not pushed or pulled in place or the touch is not good. The correct method is to push and pull the switch again. If contact is bad, it should be repaired as soon as possible.
6. The conference microphone or wireless microphone should not be used for a long time. The battery should be taken out and then installed when it is used. If sound intermittent occurs during use, it may be due to insufficient battery power. Replace the battery in time.
7. When not in use, store the microphone in a dry and clean place, and avoid storing and using it in places with high temperature and humidity, so as not to affect the sensitivity and sound of the microphone.
Medium Voltage STA Armored Cable
Medium voltage STA cable is a type of Power Cable used for transmitting electricity at medium voltage levels. The armored cable is designed with a steel tape armor layer that provides mechanical protection to the cable against external forces, such as impact, crushing, and abrasion. The armor layer also provides protection against rodents and other animals that may damage the cable.
The medium voltage STA cable is typically used for underground and overhead installations in industrial, commercial, and residential applications. It is suitable for use in harsh environments, including areas with high humidity, corrosive gases, and high temperatures.
The cable is constructed with a copper or aluminum conductor, insulated with XLPE or EPR material. The insulation provides electrical insulation and protects the conductor against moisture and other environmental factors.
The steel tape armor layer is applied over the insulation layer and provides mechanical protection to the cable. It is made of galvanized steel and provides excellent resistance to corrosion.
The medium voltage STA cable is available in various sizes, ranging from 3.3 kV to 33 kV. It is manufactured in compliance with international standards, such as IEC, BS, and ASTM. The cable is tested for quality and safety before it is supplied to customers.
In summary, the medium voltage STA armored cable is a reliable and durable power cable used for transmitting electricity at medium voltage levels. It is suitable for use in harsh environments and provides mechanical and electrical protection to the cable.
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