Introduction to Acoustics
On this page you will find the answers to the exercises in the booklet 'Introduction to Acoustics', Fifth Edition by Mark Huckvale.
1. Fill in the blanks:
2. Express the following in scientific notation to three significant figures:
3. Simplify the following:
1. Given the following (approximate) logarithms to base 10:
Find approximate solutions to the following sums without using a calculator:
2. The following measurements were made from a straight line graph:
When X is 0, Y = 12
Change in Y for 4 units along the X axis = 3.2
1. How much chocolate would I need to spread over a 1m2 surface to generate a pressure underneath of 1Pa? (assume g=10ms−2) If I spread that amount of chocolate over 1/20 of the area, how does the pressure change?
2. Winding a grandfather clock involves lifting a weight of 250g up a distance of 0.8m. Taking the acceleration due to gravity (g) to be 10ms−2, how much more energy does the fully wound clock have over the fully unwound one?
3. If the intensity of a sound at 2m from the source is 10Wm−2 , what would be the intensity at 6m from the source if the energy was radiated equally in all directions? (Hint: the total power at 2m is distributed over the surface of a sphere of radius 2m, but the total power at 6m is distributed over the surface of a sphere of radius 6m).
|© 2003 Mark Huckvale University College London|