atdavid
There has never, to my knowledge, been any positive indication that any mechanism in the human auditory system can detect past 22KHz, nor has there been any mechanism shown in the human auditory system that can cause modulation of ultrasonics to audible frequencies.
>>>>>Emphasis on “to my knowledge.” Never is a very long time. Nevertheless, I think you would have been more convincing if you had said, “never ever ever.”