sentences:  Noise shaping is a technique that adds additional noise at higher frequencies which cancels out some error at lower frequencies, resulting in a larger increase in dynamic range when oversampling.For "n"th-order noise shaping, the dynamic range of an oversampled signal is improved by an additional 6"n" dB relative to oversampling without noise shaping.For example, for a 20 kHz analog audio sampled at 4× oversampling with second-order noise shaping, the dynamic range is increased by 30 dB.