History and Evolution of the Tuning Fork

Summary & key facts

This paper traces the tuning fork from early ideas about bone hearing in the 1500s to its use in music and medicine today. The fork is a two-pronged metal tool that makes a steady pitch when struck. Doctors began using it to test hearing in the 1800s with the Weber and Rinne tests, which help tell whether hearing loss is in the ear’s parts or in the nerve. The review also describes technical improvements from the 1800s that made the fork more useful in exams.

Key facts:

• The tuning fork is a two-pronged metal fork that produces a fixed musical pitch when struck and has been used in medical hearing tests for centuries.
• Giovanni Filippo Ingrassia described the stapes (an ear bone) in 1546, and four years later (about 1550) Geralamo Cardano proposed that sound can travel through the skull (bone conduction).
• Hieronymus Capivacci in 1589 used vibration transmitted through a rod held in the teeth to help distinguish types of hearing problems, an early use of bone conduction testing.
• John Shore invented the modern tuning fork in 1711; his original fork produced the musical note A4 at 440 Hz.
• In 1834 Johann Heinrich Schreiber made a set of 54 tuning forks ranging from 220 Hz to 440 Hz in 4 Hz steps, and a 512 Hz pitch (C5) became a medical ‘scientific’ pitch.
• The Weber test was created in 1834 to help tell conductive versus sensorineural hearing loss by placing a struck fork on the midline of the skull.
• The Rinne test was described in 1855 and compares bone conduction (fork on the mastoid bone) with air conduction (fork next to the ear) to detect conductive hearing loss.
• Late 19th century changes improved the fork for exams: clamps to reduce overtones (1870), movable clamps to change pitch (1878), a metal knob for better skull contact (1886), and spring-driven activation with a small hammer and amplitude co

Topics

Australian Indigenous Culture and History Multisensory perception and integration Phonetics and Phonology Research

Categories

Experimental and Cognitive Psychology Psychology Social Sciences

Tags

Acoustics Archaeology Cognitive science Computer science Context (archaeology) Fork (system call) History Operating system Physics Psychology Tuning fork Vibration