Conference_programme: 17.4 - Annoyance due to low-level sounds transmitted to dwellings
Lecture: Masking Effect of Artificial and Natural Sounds on Residential Noises
Author(s): Ryu Jongkwan, Song Hansol
Summary:
This study investigated the effect of artificial and natural sounds on masking of residential noises through auditory experiment. Residential noises consists of floor impact noise (children jumping), TV sound, toilet flushing noise and road traffic noise. As making sounds, white, pink and brown noises were used for artificial sound, and waterfall, stream, wave, rain-fall, insect and bird sounds were also included for natural sound. In the auditory experiment, thirty subjects rated annoyance (7 point verbal scale) for only residential noises (1st Exp.) and residential noise mixed with masking sounds (2nd Exp.), which have equal sound level. In addition, represented sound level of masking sounds was modified to –3, 0 and +3 dB from original sound level, and annoyance rating experiment (3rd Exp.) was repeated for the residential noises mixed with masking sounds. Results showed that stream and wave sound had the masking effects of all residential noises, but insect and bird sound did not have masking effect at all. Masking sound effect was also shown for masking sound with 3 dB lower and higher sound level than residential noise. It was also found that sound in middles frequency range of masking sound is important for the masking of residential noise.
Corresponding author
Name: Prof Jongkwan Ryu
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Country: N/A
