What does the noise weighting curve shows?
A. Noise signals measured with a 144 handset
B. Power levels of noise found in carrier systems
C. The interfering effect of other frequencies in a voice channel compared with a
reference frequency of one kilohertz
D. Interfering effects of signals compared with a 3-kHz tone
A. Noise signals measured with a 144 handset
B. Power levels of noise found in carrier systems
C. The interfering effect of other frequencies in a voice channel compared with a
reference frequency of one kilohertz
D. Interfering effects of signals compared with a 3-kHz tone