ABX Double Blind Test Results: Fourth Order Filters
SMWTMS ABX Test Results
| Four Pole Filters vs. wire | Result | Correct | p less than | Listeners |
|---|---|---|---|---|
| Low Pass -3 dB @ 10 kHz. |  |
16 / 16 = 100% | 0.0005 | 1 |
| Low Pass -3 dB @ 12 kHz. | |
25 / 25 = 100% | 0.0005 | 1 |
| Low Pass -3 dB @ 13 kHz. | |
20 / 20 = 100% | 0.0005 | 1 |
| Low Pass -3 dB @ 14 kHz. | |
20 / 20 = 100% | 0.0005 | 1 |
| Low Pass -3 dB @ 15 kHz. | |
20 / 20 = 100% | 0.0005 | 1 |
| Low Pass -3 dB @ 15 kHz. | |
16 / 16 = 100% | 0.0005 | 1 |
| Low Pass -3 dB @ 16 kHz. | |
12 / 16 = 75% | 0.05 | 1 |
| Low Pass -3 dB @ 17 kHz. |  |
8 / 16 = 50% | - | 1 |
| The tests of filters were done on a single AR-5 speaker in mono. |
|
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. |
|
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.