How Loud Is a Security Alarm Siren? Decibel Levels Explained

How Loud Is a Security Alarm Siren? Decibel Levels Explained

Most security alarm sirens typically produce between 100 and 120 decibels (dB) at a distance of one meter. Indoor sirens generally fall in the 100–110 dB range, while outdoor models are often louder, reaching 110–120 dB or more for long-range or industrial applications. Some high-powered sirens can reach up to 130 dB, but these usually require an additional amplifier or specialty module. This high volume ensures the alarm is clearly heard, helping to deter intruders and alert nearby individuals.

For a clearer idea of what these decibel levels sound like, please refer to the chart below.

dB Level

Sound Examples

dB Level

Sound Examples

10 dB

normal breathing

80 dB

police siren

20 dB

rustling leaves

90 dB

power tools

30 dB

whisper/soft music

100 dB

motorcycle

40 dB

refrigerator

110 dB

nightclub

50 dB

moderate rainfall

120 dB

rock concert

60 dB

normal conversation

130 dB

ambulance siren

70 dB

vacuum cleaner

140 dB

gun shot


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