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"盲听在于排除心理因素的干扰,排除了先入之见结果更接近真实的听音感受。
科研试验是一定要采用“双盲”的原则,这是全世界科技界公认的。"
that's absolutely true. the study on "placebo effect" is just picking up right now and a lot of interesting things have come out of it. just a few examples:
a) there is a million dollar challenge to anyone who can tell, in a double-blind test, a reference amp from any of your amps, including low-performance car amps. The challenge has been in existence for at least 10 years and no one has been able to take it.
b) in drug testing, 80% of the FDA-approved drugs are LESS effective than sugar pills.
c) in a recent study, almost all hotel maids lost weight AFTER being told that their workload was harder than exercise, against their control group.
d) in another recent study, patients who did not receive acupunture but was told otherwise reported overwhelming improvement from their "fake" acupunture sessions.
e) in a study done in the 1980s, a group of musicians who swore that they could tell tube amps from solid state amps failed a double blind test. The only person who could consistently pick a tube amp from a solid state amp did so by listening to the excessive hum in the tube amp.
f) Bob Carver, who designed Phase Liner, Carver and Sunfire hi-fi amps, challenged the hi-fi establishment in the 1980s by stating that he could mod his amps to sound like any hi-fi amp. the whole experience, called the "Great Hi-Fi challenge" was done in the 1980s. Carver first replicated the sound of ML-2 for Audio Critic (a high-end audio mag back then), and no Audio Critic editors could tell them apart. Carver then replicated the sound of a Conrad-Johnson (then sold for over $20K, in 1985), in less than two days, and without opening up his own amp, for Stereophile (an audio mag). No Stereophile editors could tell the $500 Carver (solid state) amps from $20K Conrad-Johnson (a tube amp).
g) my own experience suggests that 1) in a controlled environment and assuming the amps are working within their own performance envelope, it is next to impossible to tell two reasonably good amps apart; b) it is extremely easy to tell two speakers apart.
Considering that speakers routinely distort 10%, and amps in the less than 1% territory, it is not difficult to understand why that's the case. |
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