It is best to specify the plan based on the on-site environment. If the actual on-site environment is not observed, it is difficult to make an ideal selection and speaker layout plan. For the installation spacing between ceiling speakers, you can refer to an industry standard: the distance between every two speakers is twice the distance from the speakers to the ground. This installation method usually meets the requirement of uniform sound playback throughout the entire venue.
According to different venue environments, the power of ceiling speakers and the layout of ceiling speaker points need to be considered, taking into account factors such as the frequent location of listeners in the entire venue, such as frequent movement, standing or sitting, and the level of background noise in the entire venue environment.
The sensitivity level of the ceiling speaker is between 88-93dB; The rated power is 3-10W. Calculated at 90dB/8W, the sound pressure level at a distance of 8m from the speaker is approximately 81dB. The above estimation did not consider the contribution of early reflected sound groups. In indoor environments, the early reflection of sound waves and the contribution of adjacent speakers can increase the sound pressure level by about 2-3dB.
According to the above approximate calculations, in venues with a ceiling not exceeding 3 meters, ceiling speakers can be uniformly arranged at a distance of 5-8 meters from each other. If only background music is considered without considering emergency broadcasting, the distance can be increased to 8-12m. In addition, the Code for Design and Installation of Fire Accident Broadcasting is applicable to Chinese Mainland.
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