Zune 30G的RMAA测试
寒假回家做了下RMAA测试，录音卡是创新X-Fi ExtremeMusic（版本号SB0460)，此卡无需多解释，虽然比在学校时用的X-Fi Elite Pro差很多，但是录音时-100dB的本底噪声和100+dB的动态还是有的（24bit，当然）。操作系统WinXP SP2，音源Zune 一代30GB。噪声和动态以及立体分离在移动设备中算很好的了，并且频响出乎预料的直，且正好在20K这个节点后快速衰减，算是很理想的曲线。
我觉得还是配个暖声且解析高的塞子才能显现出这个机器的特点。
RightMark Audio Analyzer test report
Testing device Zune 44KHz,16bit
Sampling mode 16-bit, 44 kHz
Interface
Testing chain External loopback (line-out - line-in)
RMAA Version 6.2.3
20 Hz - 20 kHz filter ON
Normalize amplitude ON
Level change -5.6 dB / -5.5 dB
Mono mode OFF
Calibration singal, Hz 1000
Polarityinverted/inverted
Summary Frequency response (from 40 Hz to 15 kHz), dB +0.06, -0.25
Very good
Noise level, dB (A) -90.3
Very good
Dynamic range, dB (A) 90.4
Very good
THD, % 0.0044
Very good
THD + Noise, dB (A) -77.6
Average
IMD + Noise, % 0.016
Very good
Stereo crosstalk, dB -89.3
Excellent
IMD at 10 kHz, % 0.014
Very good
General performance
Very good
Frequency response
下载 (13.59 KB)
2010-1-28 12:36
From 20 Hz to 20 kHz, dB -0.60, +0.06
From 40 Hz to 15 kHz, dB -0.25, +0.06
Noise level
下载 (15.94 KB)
2010-1-28 12:36
Left
Right
RMS power, dB -88.9
-88.8
RMS power (A-weighted), dB -90.4
-90.3
Peak level, dB FS -70.9
-72.2
DC offset, % -0.0
-0.0
Dynamic range
下载 (15.83 KB)
2010-1-28 12:36
Left
Right
Dynamic range, dB +89.0
+88.9
Dynamic range (A-weighted), dB +90.4
+90.3
DC offset, % -0.01
-0.01
THD + Noise (at -3 dB FS)
下载 (16.65 KB)
2010-1-28 12:36
Left
Right
THD, % +0.0043
+0.0045
THD + Noise, % +0.0139
+0.0141
THD + Noise (A-weighted), % +0.0132
+0.0133
Intermodulation distortion
下载 (17.29 KB)
2010-1-28 12:36
Left
Right
IMD + Noise, % +0.0161
+0.0162
IMD + Noise (A-weighted), % +0.0132
+0.0132
Stereo crosstalk
下载 (13.85 KB)
2010-1-28 12:36
Left
Right
Crosstalk at 100 Hz, dB -81
-84
Crosstalk at 1000 Hz, dB -88
-88
Crosstalk at 10000 Hz, dB -87
-87
IMD (swept tones)
下载 (11.88 KB)
2010-1-28 12:36
Left
Right
IMD + Noise at 5000 Hz,0.0136
0.0140
IMD + Noise at 10000 Hz,0.0132
0.0132
IMD + Noise at 15000 Hz,0.0132
0.0138
页:
[1]