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..
In December 2007, he began playing serial killer Niall Rafferty in Channel 4 's Hollyoaks, which earned him three award nominations. In 2010, Sloane appeared in the ITV crime series DCI Banks and later that year, he also played Kieran Callaghan in the BBC One serial medical drama Holby City.In July 2012, Sloane was cast as Aiden Mathis in the ABC drama series Revenge.In February 2014, he joined the cast of ABC's science fiction drama series The Whispers.n December 2007, he began playing serial killer Niall Rafferty in Channel 4 's Hollyoaks, which earned him three award nominations. In 2010, Sloane appeared in the ITV crime series DCI Banks and later that year, he also played Kieran Callaghan in the BBC One serial medical drama Holby City.