Converting between W/m² and dB for sound intensity

[Huskies213]

Can anyone help me with how you would solve these? i am lost...

1.) Soudn 1 has an intensity of 380 W/m^2. Sound 2 has an intensity level of 2.5 dB greater than the intensity level of soudn 1. What is the intensity level of sound 2?

2.) A siren produces a soudn of 120 dB at 2m. Find the intensity level of the siren at 12m.

 

[d_leet]

What have you tried to do so far?

 

[FredGarvin]

1) What is the definition of a decibel in regards to sound intensity?

2) What does this question have to do with the inverse square law?

 

[Huskies213]

Re

Can anyone help ? I am lost

 

[FredGarvin]

You need to do some reading. I gave you two very large hints with the questions I asked you. Look up the equation for calculating decibels from the sound intensity. Also, look up the inverse square law.