Signatories declared that middle “A” on the piano be forevermore tuned to exactly 440 Hz. This frequency became the standard ISO-16 reference for tuning all musical instruments based on the ...

Ruth E. Rosenberg, a music professor at University of Illinois-Chicago, started studying 432-hertz music in the mid-2010s when a student mentioned a fondness for it.

The belief that listening to music whose root frequency has been lowered from 440 to 432 hertz has healing ... and a wellness practitioner who uses singing bowls tuned to 432 hertz says they help ...