The indoor air quality inside living spaces is a fundamental factor in providing adequate comfort. In order to do this, minimum exchange must be ensured. This can obtained by means of natural or mechanical ventilation using the Controlled Mechanical Ventilation system (CMV). CMV ensures better energy performance, as winter period, warm that comes out building preheats cold enters, and opposite ...

Commercial pedestrian streets are very common in China and Europe, with many situated in historic or cultural centres. The environments of these streets are important, including their sound environments. The objective of this study is to explore the relationships between the crowd density and the sound environments of commercial pedestrian streets. On-site measurements were performed at the cas...

INTRODUCTION Hearing protection devices are one of the primary noise reduction tools in developing countries. This study is intended to produce and apply acrylonitrile butadiene styrene (ABS)/clay nanocomposites to fabricate a laboratory single cup earmuffs and then compare it with double cup and single cup pure ABS earmuffs in terms of noise attenuation performance and comfort. In addition, th...

Previous studies have shown that indoor environmental quality (IEQ) parameters may a considerable effect on office employees’ comfort, health and performance. Therefore, we initiated research program to help occupants identify IEQ they perceive as risk factors for their in an enhance comfort levels environment. Since assumed employees might different expectations related work area these differe...

After being neglected for a long time, in the last years, ships have been recognized and studied as sound emitters. The energy they generate impacts outside, but it can also affect indoor quality of life if environments are not properly designed. In fact, acoustic comfort plays pivotal role, particularly recreational crafts. present work, room acoustics camera measurements were performed, insid...

Abstract The indoor environment in educational buildings like schools and colleges need to provide a healthy atmosphere encourage the students towards learning improve their productivity. In buildings, both thermal acoustical comfort depend on site there exists relationship among open spaces, building design with external factors also its interior design. aim of current paper is study acoustic ...

Gray whales Eschrichtius robustus, while engaged in underwater signaling, circumvented noise in their environment by altering the structure and timing of their calls. Acoustic responses of whales to both naturally occurring and artificially increased levels of noise were documented during sound playback experimentation in San Ignacio Lagoon, Baja California Sur, Mexico. Nine acoustic parameters...

Of interest is the spectral character of wind turbine noise at typical residential set-back distances. In this paper, a spectral statistical analysis has been applied to immission measurements conducted at three locations. This method provides discrete probability density functions for the Turbine ONLY component of the measured noise. This analysis is completed for one-third octave sound levels...

The challenge of having good acoustics and visual comfort in lecture theatres was explored the study. aim to evaluate acoustic levels users with a view establishing their significance future designs. study selected seven (7) representing 58.33% out total 12 Ladoke Akintola University Technology Ogbomoso as sample size using simple random sampling techniques. Capacity each were determined questi...