TDA7402_07 Datasheet, PDF (20/71 Pages) STMicroelectronics – Car radio signal processor

Audioprocessor part
TDA7402
4.3.3
Peak frequency
Figure 5 shows the four possible peak-frequencies at 200, 400, 600 and 800Hz
Figure 5. Loudness center frequencies @ Attn. = 15dB.
0.0
-5.0
dB
-10.0
-15.0
4.3.4
-20.0
10.0
100.0
1.0K
Hz
10.0K
Loudness order
Different shapes of 1st and 2nd-order loudness
Figure 6. 1st and 2nd order loudness @ Attn. = 15dB, f_P=400Hz
0.0
-5.0
dB
-10.0
-15.0
-20.0
10.0
100.0
Hz
1.0K
10.0K
4.3.5
Flat mode
In flat mode the loudness stage works as a 0dB to -19dB attenuator.
20/71