Exercise

When tuning the rock band's equipment before the concert in a big concert hall, an audio engineer finds that in order to maintain appropriate loudness in this hall, he needs to increase the power of the amplifiers in comparison with the level used for the previous concert in the hall of less size.

1.

Find what does the doubling the power add to the level of loudness in decibels.

2.

By what factor k will the engineer have to multiply the intensity of I of the sound to add 10 to the sound level for the next concert of the band on the stadium?