[1] Jerry D. Wilson. Physics a Practical and Conceptual Approach. (Saunders, Fort Worth, 1993) pp. 349-351.
[2] National Institutes of Health Consensus Development Conference. Noise and Hearing Loss: National Institutes of Health Consensus Development Conference Statement (22-24 January 1990). Link to Consensus Statement.
[3] United States Occupational Safety and Health Administration. Occupational noise exposure, Standard Number 1926.52. Link to standard.
[4] JBL Corporation, JBL Professional Sound Design Manual. (JBL, 1999) Chapter 2
