ABX Double Blind Test Results: First Order Filters
SMWTMS ABX Test Results
| One Pole Filters vs. wire | Result | Correct | p less than | Listeners |
|---|---|---|---|---|
| High Pass -3 dB @ 40 Hz. |  | 28 / 32 = 88% | 0.0005 | 2 |
| Low Pass -3 dB @ 13.5 kHz. (pink noise) | |
64 / 64 = 100% | 0.0005 | 4 |
| Low Pass -3 dB @ 13.5 kHz. (music) | |
30 / 42 = 93% | 0.0005 | 5 |
| The tests of single pole filters were done on a single AR-5 speaker in mono. |
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The different symbol means it is unlikely the percent correct score occurred by chance and thus the null hypothesis was disproven, which substantiates a real difference in sound quality. |
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The same symbol means that it is likely the correct score occurred by chance, the null hypothesis is not rejected, which means no difference was found. It does remain possible a difference may be substantianted with further testing. |
Send questions or comments on the ABX Web Page to David Carlstrom.