brombo wrote:
Again from an AI search -
Floyd Toole's research on expectation bias reveals that listeners' judgments of audio quality are heavily influenced by factors other than sound, such as brand reputation, price, appearance, and suggestion from a salesperson
. His experiments, often using double-blind listening tests, demonstrated that when these biases are removed, people show a remarkable similarity in what they prefer: a neutral, uncolored, and accurate reproduction of sound.
Key findings on expectation bias
Non-audio cues matter: Toole's work demonstrated that elements external to the sound itself can change a person's perception of audio quality. For example, a listener may rate a speaker more highly because of its price or expensive-looking finish, even when they cannot distinguish it from a less-expensive speaker in a blind test.
The "sight over sound" syndrome: In audio evaluations, visual cues and pre-existing beliefs can override what a listener actually hears. When listeners were given a chance to compare speakers blindly, their "personal preference" disappeared, and most gravitated toward the same objectively accurate speakers.
Double-blind testing reveals true preferences: To combat expectation bias, Toole and his colleagues at Harman pioneered rigorous double-blind listening tests. In these tests, neither the listener nor the experimenter knows which product is being evaluated. This methodology ensures that the listener's ratings are based purely on what they hear, rather than any pre-existing biases.
Correlation between measurement and preference: Using these controlled tests, Toole confirmed a strong correlation between objective measurements and subjective listener preference. The loudspeakers that consistently ranked highest in blind tests were those with the flattest, smoothest on- and off-axis frequency response.
Individual differences are minor: Toole's research found that when the biasing influences of brand, price, and appearance are removed, individual listening preferences are more similar than the audio industry had previously assumed.
The problem with Floyd's double-blind testing is, it gave the listeners only at 15-30 second snippet of music on each speaker. When was the last time you walked into an audio showroom and auditioned a speaker for 15secons?
The rationale behind the 15second listening span is the fact that we only remember short passages of music. But in reality, we "experience" the music which requires lot longer exposure to music.