Determine Sound Intensity in SPL

1. How do you determine the intensity of sound?
2. How do you find the intensity of sound in dB?
3. How loud is 120 dB SPL?
4. How loud is 80 dB SPL?

How do you determine the intensity of sound?

Sound intensity can be found from the following equation: I=Δp22ρvw. Δ p – change in pressure, or amplitude ρ – density of the material the sound is traveling through v_w– speed of observed sound. The larger your sound wave oscillation, the more intense your sound will be.

How do you find the intensity of sound in dB?

The sound intensity level β in decibels of a sound having an intensity I in watts per meter squared is defined to be β(dB)=10log10(II0) β ( dB ) = 10 log 10 ⁡ ( I I 0 ) , where I₀ = 10⁻¹² W/m² is a reference intensity.

How loud is 120 dB SPL?

120 – 140 decibels: Such as, a rock concert, auto racing, or a hammer pounding a nail. 125 – 155 decibels: Like, firecrackers or fireworks, or a jet engine. 170 – 190 decibels: For example, a shot gun blast or a rocket lift off.

How loud is 80 dB SPL?

80 decibels is fairly loud. It's equivalent to the noise of a busy downtown street. Being loud, it is a noise level that may harm your hearing if you are exposed to it for longer periods (more than 8-10 hours/day). There's no better way to understand how loud 80 dB is than to take examples from everyday life.