An ABX test is a method of comparing two choices of sensory stimuli to identify detectable differences between them. A subject is presented with two known samples (sample A, the first reference, and sample B, the second reference) followed by one unknown sample X that is randomly selected from either A or B. The subject is then required to identify X as either A or B. If X cannot be identified reliably with a low p-value in a predetermined number of trials, then the null hypothesis cannot be rejected and it cannot be proven that there is a perceptible difference between A and B.
ABX tests can easily be performed as double-blind trials, eliminating any possible unconscious influence from the researcher or the test supervisor. Because samples A and B are provided just prior to sample X, the difference does not have to be discerned using long-term memory or past experience. Thus, the ABX test answers whether or not, under the test circumstances, a perceptual difference can be found.
ABX tests are commonly used in evaluations of digital audio data compression methods; sample A is typically an uncompressed sample, and sample B is a compressed version of A. Audible compression artifacts that indicate a shortcoming in the compression algorithm can be identified with subsequent testing. ABX tests can also be used to compare the different degrees of fidelity loss between two different audio formats at a given bitrate.
ABX tests can be used to audition input, processing, and output components as well as cabling: virtually any audio product or prototype design.
An ABXtest is a method of comparing two choices of sensory stimuli to identify detectable differences between them. A subject is presented with two known...
ABX may refer to: ABXtest, a double-blind testing method commonly used in codec listening tests and in ascertaining high fidelity Abaknon language, an...
compression efficiency. Most tests take the form of a double-blind comparison. Commonly used methods are known as "ABX" or "ABC/HR" or "MUSHRA". There...
ABX Air, Inc., formerly Airborne Express, is a cargo airline headquartered at Wilmington Air Park near the City of Wilmington, Ohio, US. ABX Air operates...
Triangle (XXY) – three unknowns, test is which is odd one out (Y = 1, Y = 2, or Y = 3). ABXABX – two knowns, one unknown, test is which of the knowns the unknown...
began to use blind tests, in which listeners cannot see the components being tested. A commonly used variant of this test is the ABXtest. A subject is presented...
compression is transparent (imperceptible), which can be verified via an ABXtest. Data files using lossy compression are smaller in size and thus cost less...
psychology A-weighting, a commonly used perceptual loudness transfer function ABXtest Auditory illusions Auditory scene analysis incl. 3D-sound perception, localization...
based on objective criteria that can be verified using techniques like ABXtesting, perceived sound quality is necessarily subjective, often with subtle...
against the Ethernet standard IEEE 802.3. Though an independent blinded ABXtest of Ethernet cables at The Amazing Meeting in 2015 found that the cables...
Society published their study in which about half of the 554 double-blind ABXtest listening trials made by 60 respondents showed the correct identification...
French companies: the specialist blood cell counter maker ABX SA (currently called Horiba ABX SAS) in 1996, and optical equipment maker Instruments SA...
claims through measurement of the sound systems and through double-blind ABXtests of listeners. There is however agreement that the overall resistance of...
engines from ABX Air. Hush kits were installed on all of the engines for noise reduction. The aircraft's stall warning system was tested and declared...
Zosurabalpin (RG6006, Abx-MCP, Ro7223280) is an experimental antibiotic developed in a collaboration between the pharmaceutical company Roche and scientists...
GPL. The VisualOn AAC encoder has been shown to be very low quality in ABXtesting. Of the four AAC encoders that have been supported in FFMpeg, it was...
thresholds for random jitter in music signals. Their method involved ABX listening tests. When discussing their results, the authors commented that: So far...
flight test. All six people on board were killed. This is the airline's deadliest accident. List of defunct airlines of the United States ABX Air Wikimedia...
01. PMID 16796788. "FDA updates Vectibix and Erbitux labels with KRAS testing info". 20 July 2009. Archived from the original on 3 March 2016. Retrieved...
October 2007). "Serratia species". Point-of-Care Information Technology ABX Guide. Johns Hopkins University. Archived from the original on 14 April 2013...
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