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..
Al Roker didnât know heâd signed up to honor a pervert. The âTodayââ show weatherman and his â20/20ââ TV reporter wife, Deborah Roberts, agreed to host a fund-raiser for La Guardia HS next month. But the couple had no clue the guest of honor was to be folk singer Peter Yarrow â a convicted sex offender who admitted molesting a 14-year-old girl.