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..
Roberts was then selected in the Welsh squad for the 2009 Six Nations Tournament. For the opening match against The Scots, Roberts was once again selected to play outside centre for the first time with Gavin Henson inside him, but Henson pulled out with another injury.oberts was then selected in the Welsh squad for the 2009 Six Nations Tournament. For the opening match against The Scots, Roberts was once again selected to play outside centre for the first time with Gavin Henson inside him, but Henson pulled out with another injury.