uxittona- is a basic tuning fork No.. 921 thread count. The pattern part of your thumb, the tip of the tuning fork is light and vibration to your. Vibration and the pattern in end of the hard objects or your ears close to the audible. Ear training, or get used up is difficult, but using the tuning fork tuning has in recent years and soothing as a popular items. It will be made, and then in 1953, international standard A (La = 440 to 1939 years conducted at the London International Meeting current (up to 2013) altered in not included. A440 (standard A = 440 Hz "or" "and the the United States) 1 octave higher than the sound of hourly time signal also 440Hz ringing your 880hz (440Hz last 3 times the sound on your TV and the Radio, 117, etc.) is ringing. It also has been the standard used in the popular 442Hz has become one of the classic 440Hz and available in this set.