Baseline Clinical Grade Tuning Fork, 512 Hz, Unweighted

The Baseline Clinical Grade Tuning Fork (512 Hz, Unweighted) is the professional standard instrument for auditory screening and hearing assessment. The 512 Hz frequency is the clinical standard for the Rinne and Weber tests — the two most widely used bedside auditory assessments for differentiating conductive and sensorineural hearing loss. The unweighted design allows the tines to vibrate freely at the pure 512 Hz frequency without the dampening effect of added weights, producing a clear, consistent tone ideal for auditory testing. Clinical grade construction ensures the frequency accuracy and durability required for reliable, repeatable professional use.

Key Features

• 512 Hz frequency — the clinical standard for Rinne and Weber auditory screening tests
• Unweighted tines for pure, undampened 512 Hz vibration ideal for auditory assessment
• Clinical grade construction — superior precision and frequency accuracy for professional use
• Standard instrument for differentiating conductive and sensorineural hearing loss at bedside
• Also suitable for upper-extremity vibratory sensation and sensory nerve assessment
• Preferred for professional clinical, diagnostic, and ENT settings

Specifications

• Brand: Baseline
• SKU: 10056E
• UPC: 19213010867
• Frequency: 512 Hz (cycles per second)
• Grade: Clinical
• Weights: No (unweighted tines)
• Use: Auditory screening, Rinne and Weber tests, upper-extremity sensory assessment
• Country of Origin: China

Ideal For

Physicians, nurse practitioners, and physician assistants who perform bedside auditory assessments including the Rinne and Weber tests to screen for and differentiate conductive versus sensorineural hearing loss will find the 512 Hz unweighted fork the standard instrument for these examinations. Otolaryngologists and ENT specialists who use tuning forks as a quick, reliable bedside complement to formal audiometric testing will find the clinical grade construction appropriate for the precision required in professional ENT practice. Occupational therapists and physical therapists performing upper-extremity sensory nerve assessments who use 512 Hz for fine touch and vibratory sensation evaluation of the hands and forearms will find the unweighted design produces a clear, consistent stimulus for sensory testing. Nursing and medical education programs that teach bedside auditory assessment techniques will find the clinical grade instrument appropriate for both instructional and clinical use.

Frequently Asked Questions

What are the Rinne and Weber tests?
The Rinne test compares air conduction to bone conduction hearing by placing the vibrating fork base on the mastoid bone and then holding it near the ear canal, asking the patient which is louder. The Weber test places the vibrating fork base on the center of the forehead and asks the patient whether the sound lateralizes to one side. Together, these tests help differentiate conductive hearing loss (caused by problems in the outer or middle ear) from sensorineural hearing loss (caused by problems in the inner ear or auditory nerve). The 512 Hz fork is the standard frequency for both tests.

Why is the 512 Hz fork unweighted for auditory testing?
Weights on tuning fork tines extend vibration duration but also slightly alter the vibration characteristics and can introduce overtones that affect the purity of the tone. For auditory testing — where the patient is listening to the sound rather than feeling the vibration — an unweighted fork produces a cleaner, purer tone that is easier for the patient to perceive and report accurately. Weighted forks are preferred for vibratory sensation testing where sustained vibration duration is more important than tonal purity.

What is the difference between clinical grade and student grade tuning forks?
Clinical grade tuning forks are manufactured to tighter tolerances with higher-quality materials, resulting in superior frequency accuracy, more consistent vibration characteristics, and greater durability under repeated clinical use. For auditory screening applications where precise frequency is important to test validity, clinical grade construction is the preferred choice for professional practice.

How do I care for a clinical grade tuning fork?
Store the tuning fork in a protective case or pouch to prevent damage to the tines. Avoid dropping the fork or striking it against hard surfaces, as this can alter the vibration frequency or damage the tines. Clean with a mild disinfectant wipe between patients. Do not autoclave or expose to high heat, as this can affect the metal’s temper and alter the fork’s frequency accuracy.