Experimental study on radiation noise frequency characteristics of a centrifugal pump with various rotational speedsTo investigate the radiation noise frequency characteristics of a centrifugal pump under various rotational speeds, a noise measurement system was established in a soundproof room....
All shut up: carlyle and the pursuit of domestic silence... The anecdote records Thomas Carlyle’s pursuit of total silence through the construction of a soundproof room made necessary by the activities of his chief tormentors – pianoforte-playing girls, crowing cocks and organ grinders....
English laboratory management (a site study at smp semesta semarang))... Existing equipment in the lab of English instructor consoles among other, repeaters language learning machine, tape recorder, DVD player, video monitors, headsets and students booth mounted in a soundproof room....
Frequency distributions of noise used in this study.... Noise levels from a speaker at a distance of 10 cm in a soundproof room were measured by a noise level meter and calculated as average of five repeated measurements....
