The human ear responds more to frequencies between 500 Hz and 8 kHz and is less sensitive to very low-pitch or high-pitch noises. The frequency weightings used in sound level meters are often related to the response of the human ear, to ensure that the meter is measuring pretty much what you actually hear. It is extremely important that sound level measurements are made using the correct frequency weighting - usually A-weighting.
'Bonanza,' 'Trapper John, M.D.' star Pernell Roberts dies. Pernell Roberts portrayed Dr. John McIntyre on Trapper John, M.D..
Mike Farrell. Wayne Rogers (for M*A*S*H) and Pernell Roberts (for Trapper John, M.D.) Introduction (from Wikipedia) Captain B. J. Hunnicutt, played by Mike Farrell, is a fictional character in the TV show M*A*S*H, which ran from 1972-1983 on CBS. Trapper John Francis Xavier McIntyre is a fictional character in Richard Hooker's M*A*S*H novels, as well as the film and the two TV series (M*A*S*H and Trapper John, M.D.) that followed them.