Table I:

Temporal SNR defining noise perceptibility limit

Condition	Approximate SNR Perception Cutoff	Potential SNR Cutoff Range
2 MHz, 0x Motion	35 dB	Less than 40 dB, but greater than 32.5 dB
2 MHz, 1x Motion	28 dB	Less than 30 dB, but greater than 25 dB
4 MHz, 1x Motion	27 dB	Less than 30 dB, but greater than 25 dB
2 MHz, 3x Motion	<20 dB	Less than 20 dB