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. Chapter One1. Fill in the blanks:
2. Express the following in scientific notation to three significant figures:
3. Simplify the following:
Chapter Two1. 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
Chapter Three1. How much chocolate would I need to spread over a 1m^{2} 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 