Choice 10" Scissor Tongs with Black Coated Handle Sound Healing Explained Tuning Fork Frequencies for Stress, Focus & Relaxation A tuning fork is a metal instrument with two prongs that produces a clear sound when struck. The prongs vibrate at a fixed frequency, creating sound waves. It is commonly used in Tuning Fork 440HZ Vibration, Steel Singing Tone Tuning Set with Silicone Hammer and Wooden Voice Box for Sound Therapy Yoga