SPL Auditor 2910, Руководство пользователя

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16 Auditor
Measurements
THD vs. Frequency
Measuring output and input 600 Ohm, Volume control Auditor 0 dB.
THD vs. frequency range from 10 to 20 kHz at 0 dB over both channels.
The values are extremely low around 0.001% throughout the whole
range; even in long sessions this ensures listening without ear fatigue.
Audio Precision 05/04/09 15:04:58 THD+N vs FREQUENCY
0.00001
5
0.0001
0.001
0.01
0.1
1
%
2k 20k 4k 6k 8k 10k 12k 14k 16k 18k
Hz
Phase Response Input vs. Output, Left and Right Channel
Measuring output and input 600 Ohm, Volume control Auditor 0 dB.
This measurement shows the minimum deviation of phase in the upper
frequency range. Phase response describes the time difference bet-
ween input and output signal – the less, the better. The extremely tight
phase response up to 50 kHz excludes any audible effects.
Audio Precision 05/14/08 13:23:13 Auditor Phase/FC
-10
+10
-8
-6
-4
-2
+0
+2
+4
+6
+8
d
B
u
-150
+150
-100
-50
+0
+50
+100
d
e
g
20 100k 50 100 200 500 1k 2k 5k 10k 20k 50k
Hz