Chapter 5: Problem 75
(a) What are the higher units of frequency? (b) How is noise pollution determined at a given place? (c) Name some sound absorbing materials.
Short Answer
Expert verified
Additionally, provide examples of sound-absorbing materials.
Answer: The higher units of frequency are Kilohertz (kHz), Megahertz (MHz), Gigahertz (GHz), and Terahertz (THz). Noise pollution is determined by measuring the sound pressure levels in decibels (dB) at a given place using a sound level meter or noise dosimeter at different times and conditions. Some examples of sound-absorbing materials include acoustic foam, fiberglass insulation, mass loaded vinyl (MLV), acoustic ceiling tiles, acoustic fabric panels, and acoustic curtains and blankets.