Two noises with equal LPC differ in total power by their bandwidth

Evidence

In evaluating Eq. 3–1, we can see that the total power will be different for two noises with the same LPC but different bandwidths. For example, a white noise (about 20,000-Hz wide) at an LPC of 30 dB SPL will have a total power equal to 73 dB SPL [10log(20,000)+30], whereas a 200-Hz narrowband noise at an LPC of 30 dB SPL will have a total power of 53 dB SPL [10log(200)+30]. Notice how the center frequency of the noise has no effect on the total power or the LPC. Because total power and LPC are representations of the physical characteristics of noise, their values are described in dB SPL. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 417

Categorization

• DEFINE: Clarifies that LPC is bandwidth-dependent for physical noise while dB SPL applies only to physical, not perceptual, representations.