NI產品與技術 討論區
使用Sound and Vibration 來測試產品Noise的問題
目前公司想著手產品Noise的測試，使用的硬體部分是NI-9234跟NI cdaq-9174
我們已經依照NI工程師教學安裝了LabVIEW2011跟DAQmx還有Sound and Vibration
但是我們副理希望現階段不要那麼複雜只用Sound and Vibration來做測試就好
但是Sound and Vibration上面我們找不到工程師所講的Octave選項
Labview2011搜尋也沒有
還有Sound and Vibration安裝時他有出現以下選項
因為我們沒有序號測試站也才剛架設沒有網路所以只能選擇Cancel的狀態下去使用產品會不會是因此沒有完整安裝?
還有我們想使用以下的模式去測試請問有人有相關的使用經驗能分享嗎?
輸入音源是使用一個電容式麥克風來接收待測產品所發出的Noise
希望使用Sound and Vibration軟體來接收產品Noise的db值
Noise Measurements
Performs common noise measurements when expecting a stationary,
stochastic signal on the input channel. These common measurements
include spectrum-based computations of the noise power, noise level,
and maximum noise spur within the specified frequency range.
Because the frequency range of interest can include low frequencies,
you can use measure and remove the DC component of the signal before performing
additional computations.
Octave Analysis
Performs fractional-octave analysis, including 1/1, 1/3, 1/6, 1/12,
and 1/24 Octave for either a single channel or N channels.
You also can apply A-, B-, or C-weighting to the octave spectrum.
The type of fractional-octave measurement you perform determines the number of
filters to apply and the passband of those filters. You can use octave analysis
to analyze audio and acoustic signals.
These analyses exhibit characteristics similar to the response of the human ear.
A-weighting filters simulate the loudness of low-level tones and de-emphasizes
frequencies below 500 Hz. B-weighting filters simulate the loudness of medium-level
tones and are used infrequently. C-weighting filters
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因為使用手冊都只有顯示結果，並沒有講解過程，對於初次使用軟體的使用者十分頭大
公司又希望短期成果要出來，沒有多餘的時間讓人去學習，NI現在又有全球的會議，
沒辦法前來，只能麻煩好心的前輩給予指導
