noise floor


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noise floor

All the unwanted, extraneous signals in an electronic circuit. It is rated in decibels below a reference point, which is determined by the system being measured. See noise.
References in periodicals archive ?
While interline transfer CCDs combine superior image quality and uniformity with a highly efficient electronic shutter, this technology is not always ideal for very low-light imaging because of the overall noise floor of their outputs.
Indeed, the noise floor of the fly-inspired microphone is about 17 decibels lower than what can be achieved using a pair of low-noise hearing aid microphones to create a directional hearing aid.
Spectrum below the noise floor is therefore not scarce, at least
5 GHz high performance analog downconverter module offers greater than 170 dB of measurement range with a good noise floor, based on the PSA series spectrum analyzer.
The noise floor is the level of continuous sound that characterizes a space at any given time.
The ultra-low phase noise HCMOS oscillator provides--162 dBc/Hz noise floor.
Additional specifications include total harmonic distortion of less than -75 dB and very low noise floor spectrum at -90 dB.
UWB theoretically transmits short pulses across a very wide swath of spectrum, and does this within the noise floor," noted Gemma Paulo.
At lower frequencies, distortion-product otoacoustic emission amplitudes were found to be significantly above the noise floor in five of the 11 patients whose hearing thresholds were 60 dB HL or worse by click auditory brainstem response testing.
The OX-205 Ultra Low Noise OCXO achieves a -178dBc/Hz phase noise floor in 25.
Tender issueSMOS has shown the importance of achieving low level of noise floor and side lobes for best image quality in aperture synthesis radiometry.
For analog audio devices, an SNR measurement involves finding the device maximum output and the bandwidth-limited rms noise floor and reporting the difference between the two in decibels.