Comparing two audio files
- 1. Comparing two audio files Colorado State University School of Biomedical and Electrical Engineering Prepared by Student: Minh Anh Nguyen Email: minhanhnguyen@q.com
- 2. Audio Detection System Verification of Design Prototype validation
- 3. Both bearings loaded correctly Line up two random signal
- 4. Upper bearing loaded incorrectly
- 5. Upper bearing loaded incorrectly Line up two random signal
- 6. Audio Detection System: prototype evaluation Audio detect loading errors Upper/Lower bearings loaded incorrectly Both bearings loaded correctly Predictive values Centrifuge misloading test + True Positive (TP) 73 False positive (FP) 0 Total test positive TP +FP = 73 - False Negative (FN) 6 True Negative (TN) 26 Total test negative FN + TN = 33 Total with bearings loaded incorrectly TP+FN = 79 Total with bearings loaded correctly FP+TN = 26 Total tests TP+FP+FN+TN = 105 Sensitivity=TP/(TP+FN) =0.924= 93% Specificity=TN/(TN+FP) = 1= 100% positive predictive value = TP/(TP+FP) = 100% negative predictive value= TN/(TN+FN) = .78 = 78% Accuracy = TP +TN/ Total tests = .9428 = 94%
- 7. Audio Detection System Prototype Evaluation 0.000 0.200 0.400 0.600 0.800 1.000 0.000 0.200 0.400 0.600 0.800 1.000 Post-TestProbabilitiyofmisloadingissue Pre-Test Probability of misloading issue Graph of Conditional Probabilities Test Negative Test Positive
- 8. Suggested future work • Use the encoder and NI myRIO motor adapter to detect position and control speed of centrifuge. Use NI myRio, Labview code and microphone kit which can buy National instrument to record and analyze the misloading issues.
- 9. Concluding thoughts • Tests results show that the audio prototype met the project expectation and produced a reliable method for identifying loading problems.