1. Equal annoyance contours for infrasonic frequencies;Andresen;J Low Freq Noise Vib,1984
2. The effects of low frequency noise on people - A review;Broner;J Sound Vib,1978
3. HPA (2010) Health effects of exposure to ultrasound and infrasound. Report of the independent advisory group on non-ionising radiation. RCE-14. Document of the Health Protection Agency: Radiation, Chemical and Environmental Hazards, 194 pp., London, UK.
4. ISO (2003a). International standard ISO 226:2003 Acoustics – Normal equal-loudness-level contours.
5. ISO (2003b). International standard ISO/TS 15666:2003 Acoustics — Assessment of noise annoyance by means of social and socio-acoustic surveys.