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..
Medium is an American television drama series that originally aired on NBC for five seasons from January 3, 2005 to June 1, 2009, and on CBS for two more seasons from September 25, 2009 to January 21, 2011. The series stars Patricia Arquette as Allison DuBois, a medium employed as a consultant for the Phoenix, Arizona district attorney's office. Allison and her husband Joe (Jake Weber) are the parents of three daughters, all of whom inherited Allison's gift.