During ADC conversion, a sinusoidal signal with amplitude being 1 is input and the ADC operates at full range. When the quantization word length b = 8bits(one symbol bit and seven data bits), the SNR of the quantization process is approximately
A: 44dB
B: 50dB
C: 56dB
D: 62dB
A: 44dB
B: 50dB
C: 56dB
D: 62dB
举一反三
- For the ADC, when the word length increases by 1 bit, the SNR during quantization increases by about 6db.
- For the ADC, when the word length increases by 1 bit, the SNR during quantization increases by about 6db. A: 正确 B: 错误
- The sound of a band is rated as 50 dB at a distance of 30.0 m. What is the dB sound level of the band when one is 10.0 m from the band? A: 59.5 dB B: 57.3 dB C: 55.2 dB D: 52.9 dB E: 50.1 dB
- 某拟建企业厂界与界外居民楼测点背景噪声值为55dB()、53dB(),预测投产后两处测点的噪声贡献值分别为55dB()、53dB(),厂界和居民楼处噪声预测值分别为(A)。A.58 dB(A)、56 dB(A)B.55 dB(A)、53 dB(A)C.55 dB(A)、56 dB(A)D.58 dB(A)、53 dB(A) A: 58 dB(A)、56 dB(A) B: 55 dB(A)、53 dB(A) C: 55 dB(A)、56 dB(A) D: 58 dB(A)、53 dB(A)
- According to WHO the normal hearing is ______. ( ) A: 10-20 dB B: 0-20 dB C: 0-25 dB D: 10-25 dB