RMAA PCM 48KHz/16bit での限界値 (理想値)


RMAAで計測を行う際、すべての計測はPCM変調の音声データ(未圧縮WAVファイル)にて行われるわけですが、
このデータの時点でも性能の限界があります。
RMAAにて測定用のWAVファイルを作成し、そのファイルをそのまま評価した場合のデータを示します。
限界であり、理想でもある値です。


RightMark Audio Analyzer test report

Testing device
Sampling mode 16-bit, 48 kHz
Interface
Testing chain
RMAA Version 6.2.1
   
   
20 Hz - 20 kHz filter ON
Normalize amplitude OFF
Level change -0.0 dB / -0.0 dB
Mono mode OFF
Calibration singal, Hz 1000
Polarity correct/correct



Summary

Frequency response (from 40 Hz to 15 kHz), dB
+0.00, -0.00
Excellent
Noise level, dB (A)
-98.2
Excellent
Dynamic range, dB (A)
98.2
Excellent
THD, %
0.0003
Excellent
THD + Noise, dB (A)
-92.2
Very good
IMD + Noise, %
0.0034
Excellent
Stereo crosstalk, dB
-98.7
Excellent
IMD at 10 kHz, %
0.0036
Excellent
General performance
 
Excellent



Frequency response

Spectrum graph

From 20 Hz to 20 kHz, dB
-0.00, +0.01
From 40 Hz to 15 kHz, dB
-0.00, +0.00



Noise level

Spectrum graph

 
Left
Right
RMS power, dB
-97.2
-97.1
RMS power (A-weighted), dB
-98.3
-98.2
Peak level, dB FS
-90.3
-90.3
DC offset, %
-0.0
+0.0



Dynamic range

Spectrum graph

 
Left
Right
Dynamic range, dB
+97.1
+97.1
Dynamic range (A-weighted), dB
+98.2
+98.2
DC offset, %
+0.00
+0.00



THD + Noise (at -3 dB FS)

Spectrum graph

 
Left
Right
THD, %
+0.0003
+0.0003
THD + Noise, %
+0.0028
+0.0028
THD + Noise (A-weighted), %
+0.0025
+0.0024



Intermodulation distortion

Spectrum graph

 
Left
Right
IMD + Noise, %
+0.0034
+0.0034
IMD + Noise (A-weighted), %
+0.0030
+0.0030



Stereo crosstalk

Spectrum graph

 
Left
Right
Crosstalk at 100 Hz, dB
-102
-99
Crosstalk at 1000 Hz, dB
-97
-98
Crosstalk at 10000 Hz, dB
-95
-95



IMD (swept tones)

Spectrum graph

 
Left
Right
IMD + Noise at 5000 Hz,
0.0036
0.0036
IMD + Noise at 10000 Hz,
0.0036
0.0037
IMD + Noise at 15000 Hz,
0.0035
0.0035






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inserted by FC2 system