1. American National Standards Institute. (1984). ANSI S1.40-Specifications for Acoustic Calibrators, R1997.
2. Barron, R. F. (2003). Industrial noise control and acoustics. Boca Raton, Florida: CRC Press.
3. Beranek, L. L. (1988). Acoustic measurements. New York: Wiley.
4. Beranek, L. L. (1993). Acoustics. Woodbridge, New York: Acoustical Society of America.
5. Beranek, L. L. (1993). Acoustical measurements. American Institute of Physics.