'This book is clearly laid out, the writing is fluid and the flow through the subject matter is well constructed. The topic area is clearly presented and new ideas are presented in a logical manner. Each chapter includes a workload example of a sound situation which is analysed in relation to the terms presented in that chapter using the author's scheme, outlined in an appendix. In addition, exercises and discussion points are provided in support of each chapter for follow-up activities.essential reading for all wishing to contribute in these areas.' - David M. Howard, Cambridge University Journal.