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Barely audible · Sound level

How loud is 9 dB?

9 dB is barely audible – sounds about 34.3 times quieter than normal conversation.

9 dB
0306085110140194

Listen: sounds near 9 dB

Silence and Fun by Charles E. Mullen (1904)
1:47Public domainby C.E. Mullen.Wikimedia Commons
1:47
I am having trouble breathing
0:03CC0 1.0by CzechcampWikimedia Commons
0:03
Leaves in the wind (Gravity Sound)
2:14CC BY 4.0by Gravity SoundWikimedia Commons
2:14
5.637e-05 PaSound pressure
7.94 × 10^-12 W/m²Intensity
×0.03Perceived vs. 60 dB talk
No limitNIOSH daily limit

How loud is 9 dB?

9 decibels is barely audible. 9 dB sounds about 34.3 times quieter than normal conversation (60 dB), and it carries 7.94e-06 times the sound energy. Typical sounds around this level: threshold of hearing, normal breathing, rustling leaves.

Decibels are logarithmic: every +10 dB means ten times more sound intensity but is heard as only about twice as loud, and every +6 dB doubles the sound pressure. That is why a few decibels can make a big difference.

Is 9 dB safe?

Yes. 9 dB is far below the levels that damage hearing. In bedrooms, the WHO recommends night-time levels around 30 dB or lower for undisturbed sleep.

Sounds around 9 dB

0 dBThreshold of hearing
The quietest sound a young, healthy ear can detect at 1 kHz (20 µPa).10 dBNormal breathing
Measured close to the face in a very quiet room.20 dBRustling leaves
A gentle breeze moving through foliage.20 dBTicking watch
Held about arm's length away.

Frequently asked questions

Is 9 dB loud?

9 dB is barely audible. For comparison: threshold of hearing, normal breathing, rustling leaves.

How many times louder is 9 dB than 0 dB?

A 10 dB increase means ten times the sound intensity and is heard as roughly twice as loud.

How long can you listen to 9 dB?

9 dB is safe for unlimited listening.