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..
Mini Bio (1) Roberts Blossom was a marvelously quirky, talented, and versatile character actor who was especially adept at portraying cantankerous old oddballs. Born in 1924 in New Haven, Connecticutt, Blossom graduated from the prestigious Asheville School in 1941 and attended Harvard. Roberts initially planned on being a therapist, but eventually changed his mind and decided to become an actor instead.