by LockedInALocker » Mon Jan 30, 2012 1:00 am
[quote="EricJP65"]I recently purchased a pair of pillowcases from Kink Engineering for Christmas, and after sleeping on them so far, I discovered something interesting. When I lay on my side, my ear pressed against the pillow, it seems like the latex is causing my pulse to be amplified not unlike a stethoscope. I was curious if anyone else has had this happen to them.[/quote]
It sounds like you are just noticing sounds that were already there but unnoticed before as a result of everyday sounds around you being reduced or cut off - those hitherto unnoticed sounds suddenly become very loud in the absence of any stronger sound. I've noticed when using earplugs that you hear a pulsating, and also things like swallowing sound far louder.
It is said that true silence really doesn't exist, because, whatever sounds you cut off, there are always more that become more prominent. The 20th-century experimental American composer John Cage, interested in concepts that stretch the very definition of music, such as silence or random noise, once related how, in search of utter silence, he entered an anechoic chamber - that is, a room designed to be utterly silent, soundproofed to exclude as much external sound as possible, and designed internally to suppress as much reverberation inside as possible. To his surprise, he didn't hear silence at all, but heard two continuous sounds: one high-pitched, and one low-pitched. He wondered what was wrong here, but said he later learned that the low-pitched sound was the sound of his blood coursing through his veins and arteries, and the high-pitched one was his nervous system operating. Apparently this experience was very influential in determining the evolution of his musical philosophy and style.
So it seems whatever moves you take to exclude sound, other sound is always present and will then seem disproportionately loud.
Regards, Michael.