Measuring and evaluating a test signal generated by a device under test (DUT)
Embodiments described herein generally relate to measuring and evaluating a test signal generated by a device under test (DUT). In particular, the test signal generated by the DUT may be compared to a reference signal and scored based on the comparison. For example, a method may include: capturing a test signal from a device under test; splicing the test signal into a plurality of test audio files based on a plurality of frequency bins; at each frequency bin, comparing each of the plurality of test audio files to a corresponding reference audio file from among a plurality of reference audio files, the plurality of reference audio files being associated with a reference signal; and calculating a performance score of the device under test based on the comparisons.
1. A method, comprising:
capturing a test signal from a device under test (DUT);
splicing the test signal into a plurality of test audio files based on a plurality of frequency bins;
at each frequency bin, comparing each of the plurality of test audio files to a corresponding reference audio file from among a plurality of reference audio files to determine a spectral distance between each of the plurality of test audio files and the corresponding reference audio file, the plurality of reference audio files being associated with a reference signal;
comparing the spectral differences to respective threshold values; and
calculating a performance score of the DUT based on the comparisons.
2. The method of claim 1 , wherein the calculating comprises calculating the performance score based on an average of the spectral distances between the test signal and the reference signal.
3. The method of claim 1 , further comprising generating a report indicating the performance score.
4. The method of claim 3 , wherein the report comprises a performance graph.
5. The method of claim 4 , wherein the performance graph illustrates the performance score of the test signal at each of the plurality of frequency bins.
6. The method of claim 1 , wherein the plurality of frequency bins comprises frequencies between 50 Hz and 16 kHz.
7. The method of claim 1 , wherein the DUT comprises a speaker.
8. A non-transitory, tangible computer-readable medium having instructions stored thereon that, when executed by at least one computing device, cause the at least one computing device to perform operations comprising:
capturing a test signal from a device under test (DUT);
splicing the test signal into a plurality of test audio files based on a plurality of frequency bins;
at each frequency bin, comparing each of the plurality of test audio files to a corresponding reference audio file from among a plurality of reference audio files to determine a spectral distance between each of the plurality of test audio files and the corresponding reference audio file, the plurality of reference audio files being associated with a reference signal;
comparing the spectral differences to respective threshold values; and
calculating a performance score of the DUT based on the comparisons.
9. The medium of claim 8 , wherein the calculating comprises calculating the performance score based on an average of the spectral distances between the test signal and the reference signal.
10. The medium of claim 8 , further comprising generating a report indicating the performance score.
11. The medium of claim 10 , wherein the report comprises a performance graph.
12. The medium of claim 11 , wherein the performance graph illustrates the performance score of the test signal at each of the plurality of frequency bins.
13. The medium of claim 8 , wherein the plurality of frequency bins comprises frequencies between 50 Hz and 16 kHz.
14. The medium of claim 8 , wherein the DUT comprises a speaker.
15. A device comprising:
a memory storing instructions for measuring and evaluating a signal generated by a device under test (DUT); and
a processor configured to execute the instructions, the instructions causing the processor to perform operations comprising:
capturing a test signal from the DUT;
slicing the test signal into a plurality of test audio files based on a plurality of frequency bins;
at each frequency bin, comparing each of the plurality of test audio files to a corresponding reference audio file from among a plurality of reference audio files to determine a spectral distance between each of the plurality of test audio files and the corresponding reference audio file, the plurality of reference audio files being associated with a reference signal;
comparing the spectral differences to respective threshold values; and
calculating a performance score of the DUT based on the comparisons.
16. The device of claim 15 , wherein the calculating comprises calculating the performance score based on an average of the spectral distances between the test signal and the reference signal.
17. The device of claim 15 , the operations further comprising generating a report indicating the performance score, wherein the report comprises a performance graph.
18. The device of claim 17 , wherein the performance graph illustrates the performance score of the test signal at each of the plurality of frequency bins.
19. The device of claim 15 , wherein the plurality of frequency bins comprises frequencies between 50 Hz and 16 kHz.
20. The device of claim 15 , wherein the DUT comprises a speaker.