AR155-1X Building Utilities Exit Exam [Reviewer] - BU3 Exam With Complete Solutions

AR155-1X Building Utilities Exit Exam [Reviewer] - BU3 Exam With Complete Solutions 86dB - answerWhat is the sound intensity level, in decibels, corresponding to 4.2 x 10-4 W/m2? 16 times - answerWhen the distance between the sound source and the receiver is quadrupled, the sound intensity is diminished by how many times? Warmth - answerWhat attribute to music is provided by the presence of low frequency reverberations? Envelopment - answerWhat attribute is greatly contributed by adequate diffusion of sound in a room designed for music? 4 meters - answerWhat is the length of a sound wave that has a frequency of 86Hz? 1*10-4W/m2 - answerThe vacuum cleaner in the house has a sound intensity of 80dB. What is its intensity in W/m2? Depth of balcony should not be more than twice the height of the balcony from the ground floor - answerWhat should be the balcony depth of an auditorium t o avoid acoustic shadowing under that balcony? Side walls - answerWhich part of an auditorium has the greatest potential to create standing waves? Sloping upward toward the stage - answerThe balcony soffit of an auditorium designed for speech should be profiled to receive the muchneeded reflected sounds. How should the underbalcony be sloped? The frequency of sound is changing as it nears the listener - answerWhat does NOT describe best the Doppler effect phenomenon in sound waves? 91dB - answerWhat is the sound intensity of an object whose power is 0.03 watts, in a 2- meter radius hemisphere?