The hospital sound environment is complex. Alarms, medical equipment, activities, and
ventilation generate noise that may present occupational problems as well as hinder …

The acoustic comfort in passenger cabins on board six passenger ships is analyzed in this
paper. The overall noise inside cabins is first evaluated, then the effect of HVAC (Heating …

Understanding the specific characteristics of onboard noise can significantly benefit human
activity in different kinds of ships. Here, the perceived noise can significantly change from …

Sound pressure levels were monitored in a general hospital, in Greece, at ten indoor
locations and at three outdoor locations, in the yard of the building. The selected indoor …

Acoustic metamaterials (AM) have emerged as an academic discipline within the last
decade. When used for sound insulation, metamaterials can show high transmission loss at …

Most people at one time or another have found themselves irritated or distracted by the
background noise in a building. The irritation might have resulted in minor aggravation or …

This research investigated differences in task performance and perception under six non-
time-varying ventilation-type background noise spectra with differing tonality. The results …

Rotating components in mechanical systems produce tonal noises and the presence of
these tones effect the quality and comfort of occupants leading to annoyance and a …

Tonal sounds are a particular problem of concern in building environments, arising from the
widely used rotating machinery (eg, compressors, fans, motors, transformers, etc.). In the …

The goal of this study was to investigate the effects of noise from building mechanical
systems with time-varying fluctuations on human task performance and perception, and to …