JSmith
Master Contributor
Rob Watts has mentioned on more than one occasion that he can hear and measure distortion down to -300 dB.
JSmith
Rob Watts has mentioned on more than one occasion that he can hear and measure distortion down to -300 dB.

Do we know what happens to the signal between the electrons?If talking electrons, they are usually measured in Coulombs.
Coulomb is defined as 6,241,509,074,460,762,607.776 electrons
An Ampere is a Coulomb of electrons passing a point in one second.
-300 dB is a ratio of 1 to 8.91e-16, or 0.000000000000000891
If I have the math right -300db in current would be 5,561 electrons passing a point in a second if compared to an ampere.
If starting with a milliamp (closer to signal level), 5 electrons.
If I have the math wrong it's mostly in the 10log vs 20log part.
Do we know what happens to the signal between the electrons?![]()
I keep hearing about blind tests' being stressful. Is this something that audio reviewers and high-end industry guys just say? Or is there evidence that blind tests actually cause stress on their own, separate from the possibility of exposing some people as fakers?I attended of his latest talks. At the end I asked him if he could hear such differences blind. He said he didn't believe in blind tests because they are too stressful. I let him be at that point.![]()
What they never explain is why that stress magically vanishes when testing level, frequency response, localization, compression…I keep hearing about blind tests' being stressful. Is this something that audio reviewers and high-end industry guys just say? Or is there evidence that blind tests actually cause stress on their own, separate from the possibility of exposing some people as fakers?
If the latter, it makes me wonder about hearing tests. When you take a hearing test, a light doesn't flash telling you that a tone is coming out of the headphones. Shouldn't that be stressful? Based on the results of that test, you learn whether something is wrong with your ears or nervous system. Yet I never found the hearing test experience to be too stressful.
Yes, was thinking of sommeliers.What they never explain is why that stress magically vanishes when testing level, frequency response, localization, compression…
Lame excuses for avoiding basic controls are rampant in all sorts of quackery, not just audio.
Imagine how stressful blind tests for medicines that determine live or death must be. Nevertheless these are common practice.I keep hearing about blind tests' being stressful. Is this something that audio reviewers and high-end industry guys just say? Or is there evidence that blind tests actually cause stress on their own,
Indeed. Just about any wine certification requires multiple blind tests.Yes, was thinking of sommeliers.
Do we know what happens to the signal between the electrons?
Anything 300dB something, would be stressful for most people I guessI attended of his latest talks. At the end I asked him if he could hear such differences blind. He said he didn't believe in blind tests because they are too stressful. I let him be at that point.![]()
I'd imagine, for some people, lie detector tests are stressful too
Polygraph tests are actually stressful and don't work well. They are still used in the CIA recruitment process, which, I'm told by former CIA personnel, precludes getting the best and the brightest.I'd imagine, for some people, lie detector tests are stressful too