ABX Double Blind Test Results: Fourth Order Filters


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SMWTMS ABX Test Results

Four Pole Filters vs. wireResultCorrect p less thanListeners
Low Pass -3 dB @ 10 kHz. Different 16 / 16 = 100%0.0005 1
Low Pass -3 dB @ 12 kHz. Different 25 / 25 = 100%0.0005 1
Low Pass -3 dB @ 13 kHz. Different 20 / 20 = 100%0.0005 1
Low Pass -3 dB @ 14 kHz. Different 20 / 20 = 100%0.0005 1
Low Pass -3 dB @ 15 kHz. Different 20 / 20 = 100%0.0005 1
Low Pass -3 dB @ 15 kHz. Different 16 / 16 = 100%0.0005 1
Low Pass -3 dB @ 16 kHz. Different 12 / 16 = 75%0.05 1
Low Pass -3 dB @ 17 kHz. Same 8 / 16 = 50%- 1


The tests of filters were done on a single AR-5 speaker in mono.

Different 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.
Same 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.

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Web Page Created by David Carlstrom. Last Modified: 1/26/2011