1. Bies D, Hansen C (2009) Engineering noise control: theory and practice, 4th edn. Spon Press
2. Blackstock DT (2000) Fundamentals of physical acoustics. Wiley-Interscience
3. EC 60651 (2001) Sound level meters. Standard, International Electrotechnical Commission
4. IEC 60050–801 (1994) International electrotechnical vocabulary—chapter 801: acoustics and electroacoustics. Standard, International Electrotechnical Commission
5. ISO 12001 (1996) Acoustics—noise emitted by machinery and equipment—rules for the drafting and presentation of a noise test code. Standard, International Organization of Standards