Appropriate background noise level regarding speech privacy and annoyance in a train cabin
Invited paper
Hanyang University
Monday 1 june, 2015, 18:00 - 18:20
0.9 Athens (118)
Abstract:
The background noise levels in passenger cars of high-speed trains were
investigated in relation to speech privacy and noise annoyance. Auditory
experiments were conducted for speech signals with background sounds varying
speech to noise ratios (SNR). The results showed that speech privacy decreased
considerably and noise annoyance increased as the SNR increased from -6 to -3
dBA. In addition, annoyance increased significantly for the increase of
background noise level over 63 dBA. The optimal level of interior noise was
suggested as 60-63 dBA for enhancement of acoustic comfort with normal speech
level in high speed trains.