A tuning fork is a &quot;Y&quot; shaped steel or aluminum alloy sound generator. Various tuning forks can produce pure tones of different frequencies when vibrating due to their different quality, arm length and thickness. The tuning fork test is a simple and reliable method in distinguishing the nature of deafness (hearing transmission deafness or sensorineural deafness).</p> Features: The tuning fork check in distinguishing nature of deafness: sound transmission deafness, or sensorineural deafness. When using clamping the fork handle, with a soft rubber mallet or other soft elastic body percussion, that can occur 128Hz sound waves. Convenient to use. Ideal for doctors, nurse and healthy professionals etc. Used to test patient hearing as well as vibratory sensitivity in cases of nerve damage.</p> Specifications: Color: silver Material: aluminium alloy, wood Frequency: 128Hz Tuning fork size: 210 * 40 * 35mm / 8.3 * 1.6 * 1.4in Tuning Fork weight: 100g / 3.5ounce Package size: 220 * 40 * 30mm / 8.7 * 1.6 * 1.2in Package weight: 130g / 4.6ounce</p> Package list: 1 * Tuning Fork 1 * Striking Mallet</p>