Nov 18, 2007 #1 M mitrobge Member level 3 Joined Feb 19, 2005 Messages 55 Helped 4 Reputation 8 Reaction score 1 Trophy points 1,288 Location GREECE Activity points 1,626 what does the A-weighted term mean?
Nov 19, 2007 #2 dwayne22 Junior Member level 2 Joined Mar 12, 2006 Messages 24 Helped 3 Reputation 6 Reaction score 3 Trophy points 1,283 Activity points 1,435 Re: 120 dB, A-weighted A-weighting is a filtering of the subject signal (such as noise) to approximate human hearing. Try using Google with "A-weighting" It is often used in audio to specify noise levels, since the human ear is less sensitive to high and low frequencies. Sometimes also noise from things like fans. Generally makes noise numbers lower than a flat, brick wall response. So the produce appears better ...
Re: 120 dB, A-weighted A-weighting is a filtering of the subject signal (such as noise) to approximate human hearing. Try using Google with "A-weighting" It is often used in audio to specify noise levels, since the human ear is less sensitive to high and low frequencies. Sometimes also noise from things like fans. Generally makes noise numbers lower than a flat, brick wall response. So the produce appears better ...
Nov 20, 2007 #3 C castrader Member level 1 Joined Jun 8, 2005 Messages 36 Helped 7 Reputation 14 Reaction score 1 Trophy points 1,288 Activity points 1,468 120 dB, A-weighted for audio band 20-20kHz, gain is about 0dB other band, gain is attenuated much. a-weighted @1kHz gain=0dB 1kHZ<signal<5kHz gain>0dB, max gain is about 2-3dB, other range gain<0dB
120 dB, A-weighted for audio band 20-20kHz, gain is about 0dB other band, gain is attenuated much. a-weighted @1kHz gain=0dB 1kHZ<signal<5kHz gain>0dB, max gain is about 2-3dB, other range gain<0dB