1、 The sound system needs to have strong power reserves

Indoor sound fields require a lot of power because they require an increase in sound pressure level of 3dB and a power increase of 10 times. According to the sound pressure level formula

DBspl=20 log (P1/po)=20 log (L1/L2)=10 log (P1/P2)

The results indicate that 10logp2/P1=XDB can be used to calculate the ratio of sound field.

Secondly, choose a microphone with high sensitivity

This can improve the sound transmission gain of the microphone, allowing the listener to obtain sufficient loudness. The microphone for indoor performances is usually far from the mixing station, so try to use a wireless microphone to pick up the sound. If the indoor wind exceeds level 3, the microphone can be equipped with a wind shield. The windshield is made of special porous and breathable polystyrene foam, which has little effect on the frequency characteristics, but its sensitivity is slightly reduced. The GIAN knob on the mixer can be adjusted to ensure that the sound transmission gain does not decrease. If it's drizzling outside and you need to perform, do not cover the microphone with a plastic bag, as the plastic bag can prevent sound waves from directly acting on the microphone diaphragm, causing significant damage to the frequency characteristics. Try connecting the support umbrella to the microphone to prevent rain. If it rains heavily, the performance can be stopped.

3、 Hoisting horn

Indoor audio products should not be placed too low. The sound waves of the subwoofer are easily absorbed by the audience, resulting in line wiping absorption, especially in the loss of mid to high frequencies. Therefore, it is necessary to install the speaker through lifting. Medium or high pitched speakers and special indoor speakers (speakers with high-power high pitched speakers). As a result, sound waves from the speakers are radiated into the air, allowing the audience to obtain sufficient volume.