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16th January 2006, 08:56 AM
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#1 |
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diyAudio Member
Join Date: Apr 2003
Location: suceava
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100dB
hy all.
Can someone please explain me what it means this -100dB inscription on my sound card? I know that dB is a measure unit for noise but why is it negative. thanks. Best regards!
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eugen |
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16th January 2006, 09:10 AM
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#2 |
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Electrons are yellow and more is better!
diyAudio Member
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It means probably that the noise and distortion level is 100 dB under full output voltage (0.001%).
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/Per-Anders (my first name) or P-A as my friends call me |
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16th January 2006, 06:57 PM
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#3 |
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diyAudio Member
Join Date: Jan 2006
Location: Avalon Island
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>I know that dB is a measure unit for noise.
Actually, dB refers to a power ratio, logarithmically expressed. It compares one thing to another. In this case a minus would indicate that something is 100dB less than something else. |
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16th January 2006, 07:06 PM
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#4 | |
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diyAudio Member
Join Date: Oct 2004
Location: At the sea front, just under Rotterdam
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Quote:
You mean 20Log( 1/ 100.000 )= -100dB Welcome, Lady Merlin.
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Looks like Sponge Bob has killed another thread. |
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17th January 2006, 07:44 AM
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#5 |
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diyAudio Member
Join Date: Jul 2004
Location: Scottish Borders
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I do hate the confusion caused by the difference in the British and continental way of using , & . to indicate the decimal point and grouping large numbers into 10^3.
100,000.0 (GB) = 100.000,0 (Rotterdam) =10^5(unconventional but understood) Give us a solution that works world wide. No, don't suggest we revert to imperial measure (using 1/12, ounces and pints) to match the old fogies across the pond.
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regards Andrew T. |
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17th January 2006, 07:53 AM
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#6 |
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diyAudio Member
Join Date: Oct 2004
Location: At the sea front, just under Rotterdam
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