Background music distribution is a common function of public address systems, usually associated with other functions such as announcements. If it's just music distribution, the requirements are as follows:
- The system's frequency response must be extended from 100 Hz to 10 kHz to ensure a more faithful listening experience of the original message.
- The dynamic range for background music distribution is limited. The necessary sound pressure level is lower than that required for announcements to be delivered as well.
- The requirement for uniform coverage and the absence of dead spots is less stringent than for announcements or audio reinforcement; loudspeakers can be spaced further apart, or areas can be left uncovered (e.g., those with low traffic).
