Measurement of low frequency impact insulation

Abstract

The measurement of low frequency impact sound in rooms (below 100 Hz) is critical to determining human response and acceptability of floor ceilings [1], [2]. Measurement uncertainties generally increase at lower frequencies, and a lack of precision is a general problem that ratings of low-frequency noise must overcome. Impact noise uncertainties at low frequencies are reviewed. The effect on measurement uncertainty of changes to the measurement procedure (such as fixed vs. roving microphones, measurement duration, microphone position, number of tapping machine locations, etc.) is studied, with emphasis on the uncertainties in the 50-80 Hz third-octave bands. The measurement uncertainty will be related to the precision desired to accurately relate to human reaction.

Impact Sound Insulation Performance Testing of Nano-Inorganic Composite Floor Slabs for Green Buildings

“…In recent years, Walshe K has conducted research on the sound insulation performance of sound insulation floating floor slabs [6]. Dong D. W. compared the performance of solid wood flooring, 20 mm thick XPS insulation board, and sound insulation floating floor slab [7]. For 5 mm sound insulation pad, 30 mm sound insulation mortar, and 30 mm thick composite foamed cement board, the performance of the five construction methods of 20 mm thick XPS insulation board and 5 mm thick sound insulation coating is compared by Homb A [8,9].…”