In general indoor performances, more attention is paid to audio equipment, and it is necessary to ensure that the equipment has a good sound quality, pleasant and beautiful sound. An important requirement of stage performance art is sound transmission technology. First of all, it is necessary to ensure that there will be no acoustic accidents in the performance and that the performance tasks can be completed smoothly. Therefore, there are several requirements for the installation technology of indoor performance audio equipment, let's take a look!

Problems and inspection methods of performance audio equipment

skills requirement:

First, the sound system should have a strong power reserve

The indoor sound field requires strong power, because the indoor sound field needs to increase the sound pressure level by 3db, and the power needs to be increased by 10 times. According to the sound pressure level formula dBspl=20 log(P1/po)=20 log(L1/L2)=10 log(P1/P2), the results show that 10logp2/p1=xdb can be used to calculate the ratio of the sound field.

Second, choose a high-sensitivity microphone

In this way, the sound transmission gain of the microphone can be enhanced, and the listener can obtain sufficient loudness. The microphone for indoor performances is usually far away from the mixer, so try to choose a wireless microphone to pick up the sound. If the indoor wind exceeds level 3, the microphone can be equipped with a windshield. The windshield is made of porous and breathable special foam plastic, which has little effect on the frequency characteristics, but the sensitivity is slightly reduced. It can be adjusted by the GIAN knob on the mixer to ensure that the sound transmission gain will not decrease. If there is light rain outside and you need to perform a performance, do not give the microphone a plastic bag cover, because the plastic bag cover prevents sound waves from directly acting on the microphone diaphragm, causing great damage to the frequency characteristics. Try to install a support umbrella on the microphone to prevent rain. If it rains heavily, the performance can be terminated directly.

Three, hoisting speakers

Indoor performance audio equipment should not be placed too low. The sound waves of low-level speakers are easily absorbed by the audience, resulting in glancing sound absorption, especially mid-to-high frequency loss. Therefore, it is necessary to install the speakers by hoisting. Mid-range or tweeter and special indoor speakers (the speakers are equipped with high-power tweeters). Therefore, the sound wave of the speaker is radiated to a far place in the air, so that the listener can obtain sufficient volume.

Problems and inspection methods of performance audio equipment

Fourth, protect the speaker line

Indoor performance The distance between the power amplifier and the speakers is usually relatively long. In order to prevent the speaker wire from being cut and short-circuited and causing the power amplifier to malfunction and damage, special personnel should be assigned to protect the speaker wire. The output impedance of the power amplifier is very small, only a few ohms, but the sound power is large, so the current is relatively large. The distance of this line should not be too long, and the cut-off area should not be too small, so as not to cause unnecessary sound power loss. If conditions permit, the power amplifier can be placed near the speaker to reduce unnecessary losses.

Five, protect the power cord

The energy of the speaker system comes from the power grid circuit. If the power circuit fails, there will be a problem with the audio system. Therefore, the power circuit should be guaranteed by a local professional electrician. The entire line from the sound console to the indoor switch or temporary generator should be protected by special security personnel.

Sixth, the sound engineer must be clear about the effect on the auditorium in time

The sound engineer should keep in touch with the audience assistant through the walkie-talkie, so that the sound engineer can grasp the audience's sound effect more accurately and in time, so as to adjust in time.