Assertion: fm stereo | /r/HasAspect | 40 db or more separation
Facets:
value: at 15 khz
type: LOCATION
Source sentences:
text: However, the Kahn system suffered from lower stereo separation above 5 kHz (reaching none at 7 kHz whereas FM stereo has 40 dB or more separation at 15 kHz) and the radio antenna array on directional AM (common on a lot of nighttime and some daytime stations) had to have a flat response across the entire 20 kHz AM channel.