Technical index

The sound reinforcement characteristic index of the hall shall be carried out in accordance with the requirements of the national first-level characteristic index. details as follows:

Level 1 characteristic index requirements:

Maximum sound pressure level: greater than or equal to 110dB;

Transmission frequency characteristics: the average sound pressure level of 100~6300Hz is 0dB, within this range +/- 4dB is allowed, and 50Hz-10000Hz is allowed

Xu +4~-8dB;

Sound transmission gain: -8dB, 125Hz～4000Hz;

Sound field unevenness: less than or equal to 8dB, 1000~4000Hz;

Total noise level: less than or equal to 30dB (A).

Power requirements

In order to ensure the high-quality operation of the sound system, the following requirements are put forward for the power supply of the sound reinforcement system:

⑴. The power supply of the sound reinforcement system should be separated from the power supply of the lighting and the power supply should be handled by the voltage regulator equipment.

⑵. The transformer group of the power supply of the sound reinforcement system should be separated from the transformer group of the high-current power supply such as lighting and air-conditioning.

⑶. The power supply capacity of the sound reinforcement system is AC 220V/10 kVA. If conditions permit, it is best to use two-way power supply, with automatic switching between main and standby.

⑷. The power pipeline and the audio pipeline should be avoided as far as possible. If it is impossible to overcome, the interval should not be less than 50cm.

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