Audibility is one of the most important aspects of the fire command stations as there need to be clear cut sounds when an emergency occurs. Not only the fire alarms, but the communication systems also need to be very loud. This is because when there is an emergency, people tend to panic and create a lot of noise which may drown the alarms initiated by the fire command stations. Not only can this, sometimes, the sound of objects burning and sometimes bursting also hamper the loudness of the fire alarms.
NY Engineers make sure that all the alarms installed inside the building can generate a fire alarm signal of a power up to 70 dB. Our engineers measure this sound level at a height of 5 feet above the ground so that maximum intensity can be maintained and assured. This standard should be followed for the general office space and foyers.
For other areas, our engineers recommend that the sound should be 15dB. Our engineers measure these sound about 7 feet above the ground. Our engineers also recommend that the alarm should be at least 5dB above any other alarm sounds in the environment.
The location and placement design required for the alarms will be facilitated for the building according to the SPFE rulebook for the building or residence. The audible notification appliances shall be configured according to the SPFE standard as well. This standard will help the engineers to calculate the sound attenuation through doors, walls and other obstacles. This is done so that maximum propagation can be guaranteed. This is also done so that the sound can travel from room to room in order to be amplified.
Wherever the communication systems are provided, our engineers will make sure to provide an automatic evacuation message which can be broadcast to all the speakers in the building to ensure everyone knows that an evacuation is in process. However, elevators and staircases will not have an automatic message broadcast, but instead; a manual announcement must be made on the speakers.