The sound level from a musical instrument playing 50 dB . If three identical musical instruments are played together then compute the total intensity . The intensity of sound from each instrument is 10^(-12) W m^(-2)

The sound level from a musical instrument playing 50 dB . If three ide

1.	The sound level from a musical instrument playing 50 dB . If three identical musical instruments are played together then compute the total intensity . The intensity of sound from each instrument is 10^(-12) W m^(-2)
Answer» Solution :`Delta L = 10 log _(10) \|(I_(1))/(I_(0))\| = 50` dB `log_(10) \|(I_(1))/(I_(0))\| = 5` dB `(I_(1))/(I_(0)) = 10^(5) IMPLIES I_(1) = 10^(5) I_(0) = 10^(5) xx 10^(-12) W m^(-2)` `I_(1) = 10^(-7) W m^(-2)` Since THREE musical instruments are played , therefore `I_("total") = 3 I_(1) = 3 xx 10^(-7) W m^(-2)`