Home Propeller Head Plaza

Technical and scientific discussion of amps, cables and other topics.

Was IMD controlled for in the previous studies?

Don't think so. Kaoru and Shogu showed that once they redesigned their experiments to eliminate IM distortion in the speakers involving ultrasonic frequencies, then the graduate students could not disprove the null hypothesis.

Now, adding high tech things like reading brain waves does not remove the need to control for IM, as otherwise the difference in the brain waves could be explained by the IM distortion products in the audible range. High tech does not remove the requirements for proper design and controls.

As I said in the post you couldn't link to, this does not prove that people can NOT hear ultrasonic frequencies, but it does show that previous experiments which lacked controls for IM in the audible range had not proved anyone can.
____________________________________________________________
"Nature loves to hide."
---Heraclitus of Ephesus (trans. Wheelwright)


This post is made possible by the generous support of people like you and our sponsors:
  Schiit Audio  


Follow Ups Full Thread


You can not post to an archived thread.