Are 10 people screaming louder than 1 person screaming

Question

Are decibels like a threshold? If 10 people scream I imagine it would be louder, does that mean that sound stacks on itself?

In: Physics

Answer 1

It does stack. As I recall, two speakers at the same volume results in 3 dB higher output than a single speaker. The scale is logarithmic though, so you would need four speakers to be 6 dB higher than one, and eight would be 9 dB higher.