New answers tagged sampling
2
I'm surprised nobody else has mentioned this, but the unit in the digital domain is dBFS, where FS stands for Full Scale. 0 dBFS represents the maximum digital signal level. A signal would clip in the digital domain above 0 dBFS. Note, however that just restraining a signal to just below 0 dBFS might not be enough to avoid clipping: Depending on the method ...
5
Once a signal is digitized it is treated as a number (as you quite rightly point out) and for 16bits the range of numbers are -32768 to +32767. The numbers are created by an analogue to digital converter.
The analogue to digital converter (ADC) will have a maximum input range from -X volts to +X volts (i.e. real signals that you could measure inside your ...
2
There is no direct or absolute correspondence between 'original' amplitude and sample value. The concept of dB itself is one of relative amplitude -- unless you specify a reference value, as in dBa or dBm, all you know about a decibel is that it represents a (logarithmic) ratio. There is no 'zero dB' as such.
In asking about original amplitude do you mean ...
0
The first thing to realize is that dB is a logarithmic scale. For every 10dB change, the signal level changes by an order of magnitude. 0db means the signal is unaltered when sampling or "full power" when dealing with a recording. -infinity is 0 signal strength and the amplitude of the signal can be anywhere in between.
To get a +dB level, ...
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