Tgun5, there is a very simple and predictable explanation for what you describe. Yourself, your son, and your audiobuddy were all psychologically primed to report some kind of audible change between the two trials, and unconscious logic would dictate that if you were making a change, it should be for the better. Just because you didn't actually tell your son or your buddy what exactly you were doing doesn't mean this heightened expectation wasn't being created. It was not a double-blind test, meaning you (the tester) were full of positive expectations when you tested not only yourself, but also your other two subjects, to whom that expectation was subliminally communicated via unconscious cues you provided them. Congratulations, you have done an educational experiment confirming the power of this well-known tesing bias phenomenon. I hope you know, or can imagine, what kind of tests you really need to run in order to discover whether either yourself or anybody else can actually detect an impact on the sound from the clock's presence to a statistical significance. If you do those tests, I think you'll find the effect is infinitely less than the variety you've demonstrated so far. (In fact, even if you just continue doing informal A/B trials involving only yourself, you stand a very good chance of coming to the conclusion that the clock was never doing anything at all for the sound.)
I've got to admit, the "other" threads on this topic notwithstanding, it still absolutely blows my mind that people as educated and high-earning as audiophiles tend to be, can so often fail to display even a basic grasp on such elementary principles of human sense, perception, and behavior related to listening, as well as scientific procedural principles in general...And I find it not a little ironic that a hobby so dependent on applied technology can also be so infected with an inclination toward the anti-scientific, the magical, and the self-delusionary. Are audiophiles really this ignorant and gullible? Are they even more ignorant and gullible than people in general? It seems like they shoudn't be, and I'm pretty sure that once upon a time they weren't, but today? I don't know...
I've got to admit, the "other" threads on this topic notwithstanding, it still absolutely blows my mind that people as educated and high-earning as audiophiles tend to be, can so often fail to display even a basic grasp on such elementary principles of human sense, perception, and behavior related to listening, as well as scientific procedural principles in general...And I find it not a little ironic that a hobby so dependent on applied technology can also be so infected with an inclination toward the anti-scientific, the magical, and the self-delusionary. Are audiophiles really this ignorant and gullible? Are they even more ignorant and gullible than people in general? It seems like they shoudn't be, and I'm pretty sure that once upon a time they weren't, but today? I don't know...