Five ways to deal with acoustic problems in professional audio

　　Five ways to deal with acoustic problems in professional audio

　　1. Sound gathering

　　Professional audio is planning to prevent concave arc walls or curved surfaces. If it cannot be prevented, use decoration materials to gather the gathering points of the concave surfaces beyond or above the listening area, or use sound-absorbing materials and convex circles within the music area. Arc reflects materials, absorbs or disperses sound energy, and destroys its aggregation.

　　2. Vibrating echo

　　Parallel walls or regular polygons have vibrating echoes. Perhaps this parallel wall can be changed. The plane composition of the polygon rules can be changed. Note, if there are double-sided parallel walls, but the sound source is not between the two parallel walls. And the direction of sound propagation is not perpendicular to the two walls. At this moment, although the defects that constitute the tremor echo exist, the tremor echo may actually constitute It is greatly reduced.

　　3. Echo

　　When arranging the two sets of left and right channel speakers for professional audio, don’t be too far apart. The time difference between the sound of the two sets of speakers and the listening seats in the hall shall not exceed SOms (the distance difference shall not exceed 17 meters). The time difference between the direct sound of the speaker and the reflection on the opposite wall of the main speaker is less than 50ms. Others can also consider sound absorption treatment on the opposite wall of the main speaker or a dispersive surface for reasonable dispersion, or plan the reflective surface so that a reflected sound can be reflected to the rear audience to improve the listening effect of the rear.

　　Because of the characteristics of sound propagation and the result of the masking effect of human ears, the composition of echoes has the following rules for us to master and use.

　　Generally speaking,

　　①Echoes occur more easily in large rooms than in small rooms;

　　②Short reverberation time is easier to produce echo than longer reverberation time,

　　③Speaking sounds are easier to echo than music sounds;

　　④ The listener presents an echo more easily in a place close to the sound source than in a place far away from the sound source.

　　4. Sound and shadow

　　When planning, we must fully consider the decoration structure of the stage and the speaker cloth to ensure that all audiences can see the professional audio of the mid- to high-range speakers. To prevent the occurrence of sound and shadow, add auxiliary speakers to the sound reinforcement system planning when necessary.

　　5. Acoustic coupling

　　Note that the coupling between the untreated space and the hall will lengthen the reverberation time or be affected by the reverberation sound of the adjacent space. Sound insulation and sound absorption of the coupled space (aisle. corridor) can be used to reduce the impact.

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