ASUS Essence One MKII MUSES Edition 用户手册

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ASUS Essence One Series 

Audio Precision

07/15/11 10:48:30

-180

+0

-160

-140

-120

-100

-80

-60

-40

-20

d

B

20

20k

50

100

200

500

1k

2k

5k

10k

Hz

The level of any undesired system noise signals over the audio spectrum, including AC 

mains hum, white noises, stray magnetic field, etc. 
•

Signal-to-Noise Ratio, the ratio of the maximum amplitude signal to the sum of the noise 

energy. The higher, the better. 
•

Total Harmonic Distortion plus Noise, measured by attenuating the fundamental signal 

with a narrow band notch filter, then measuring the remaining signal which consists 

of harmonics of various order. This implies the linearity of the audio converter and the 

lower, the better. 
•

A measure of a device’s ability to respond to a fixed input voltage, at different input 

frequencies, and the difference in amplitude reproduced for each frequency. The flatter 

curve at wider frequency range is better. 
•

The difference, usually expressed in dB, between the highest and lowest amplitude 

portions of a signal which a device can linearly handle. Ideally it should be very close to 

SNR value and the higher, the better. 
•

Unwanted signal coupling from another channel of stereo or multi-channel 

transmission. The lower value is better.