Your question: How loud is a fire alarm in dB?

How Loud Are Fire Alarms? NFPA 72 outlines the requirements for fire alarm notification appliances, which take two primary forms: audible and visible. Horns and sirens provide the audible alert, sounding off at 65 to 120 decibels (dB) when standing 10 feet from the device.

How loud is a fire alarm in decibels?

Noise levels of alarms

Fire alarms are set at a maximum level of 120 dBA; however even at this high level, an individual’s true exposure is unlikely to approach the 90 dBA average due to: Distance away from the alarm – noise levels fall off as the square of the distance.

What is dB reading on smoke alarm?


Noise Volume in decibels (db)
smoke alarm (3 m ) 85
aeroplane from a mile away 85
motorbike 100
orchestra 105

How loud is a home smoke detector?

Smoke detectors made for home use generally emit 85-decibel alarms, while smoke detectors installed in loud public buildings may emit alarms as loud as 110 decibels.

What does 120 decibels sound like?

Comparative Examples of Noise Levels

Noise Source Decibel Level
Thunderclap, chain saw. Oxygen torch (121 dB). 120
Steel mill, auto horn at 1 meter. Turbo-fan aircraft at takeoff power at 200 ft (118 dB). Riveting machine (110 dB); live rock music (108 – 114 dB). 110
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How loud should an alarm be?

Note: Alarm sounders that are too loud may be dangerous and cause panic, discomfort and make communication very difficult. As guidance, the overall alarm level should be a maximum of 10 to 15 dB(A) over the ambient background noise.

How much is 60 decibels?

60 decibels is as loud as a normal conversation between two people sitting at a distance of about one meter (3 ¼ feet). It is the average sound level of a restaurant or an office.

How many dB is a dog bark?

An average size dog barks at “120 db and 500 Hz.” Damage to the human ear can occur at 85 db. Therefore, a continu- ally barking dog can cause stress and loss of sleep.

How many dB is a 12 gauge shotgun?


.410 Bore 28″ barrel 150dB
18 1/2″ barrel 156.30dB
20 Gauge 28″ barrel 152.50dB
22″ barrel 154.75dB
12 Gauge 28″ barrel 151.50dB

How many dB is a car alarm?

Five decibels louder than a jet engine and five decibels below the threshold of pain, the most obnoxious car alarms blast away at 125 decibels.

How loud are Kidde smoke detectors?

OPERATION: The alarm is operating once it is activated and testing is complete. When products of combustion are sensed, the unit sounds a loud 85db pulsat- ing alarm until the air is cleared.

Will a fire alarm hurt my dogs ears?

There is no doubt that dogs can hear fire alarms and often hear them long before we do. … Only a continual blasting of a siren or super-loud noise will cause hearing problems. The vet clinic at Mississippi State University found exposure to repetitive gunshots will damage a hunting dog’s hearing.

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Do fire alarms hurt cats ears?

Loud noises are extremely bothersome to cats and their sensitive ears. There are noises that are painful to our ears – a loud fire alarm, for example. But the threshold for “loud” is a lot lower for a cat. … But sudden loud noises, like fireworks, happen too quickly for this reflex to take effect and provide protection.