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

Contents

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?

Volume

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?

Table-1-SHOTGUN-NOISE-DATA-DECIBEL-AVERAGES

.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.

## 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.