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..
Barry Sloane Richard Shotwell/Invision/AP. The role, which is in first position, will see the Revenge star play a Defense Department investigator in the drama from exec producer Steven Spielberg.Barry Sloane 's Revenge days may be numbered.The actor, who plays Aiden on the ABC soap, has been tapped to star in the network's alien drama pilot The Visitors, The Hollywood Reporter has learned. The role is in first position to Revenge, though his future with the veteran soap is still being determined.arry Sloane Richard Shotwell/Invision/AP. The role, which is in first position, will see the Revenge star play a Defense Department investigator in the drama from exec producer Steven Spielberg.