Sound files for Alvarsson, J. J., Wiens, S., & Nilsson, M. E. (2010).

2019-06-18T19:55:48Z (GMT) by Stefan Wiens
Experimental sounds used by
Alvarsson, J. J., Wiens, S., & Nilsson, M. E. (2010). Stress recovery during exposure to nature sound and environmental noise. International Journal of Environmental Research and Public Health, 7(3), 1036-1046. doi:10.3390/ijerph7031036

The sound pressure levels of the noises were higher, equal or lower than the sound pressure level of the nature sound. The experimental sounds were selected from a large database of binaural recordings of environmental sounds. The nature sound was chosen to be more pleasant than the three noises, including the ambient noise of lower sound pressure level. The four experimental sounds are described below.
(1) Nature sound. A mixture of sounds from a fountain and tweeting birds. The average sound pressure level was set to 50 dB (LAeq, 4 min).
(2) High noise. Road traffic noise recorded close to a densely trafficked road. The average sound pressure level was set to 80 dB (LAeq, 4 min).
(3) Low noise. The same noise as (2), but set to a lower average sound pressure level, 50 dB (LAeq, 4 min).
(4) Ambient noise. A recording from a quiet backyard, with a constant low level ambient noise, mainly caused by ventilation systems of the buildings surrounding the yard. The average sound pressure level was set to 40 dB (LAeq, 4 min).