What is a common tool used to present tones during threshold measurements?

The common tool used to present tones during threshold measurements is an oscillator. An oscillator generates a steady tone at a specific frequency, allowing the hearing specialist to assess the patient's hearing sensitivity at various pitches. This is crucial during audiometric testing, where accurately determining the threshold of hearing—defined as the lowest level at which a person can hear a sound—is vital for diagnosing hearing loss and determining the appropriate hearing aid or treatment.

While other tools may assist in the testing process, such as audiometers which provide a broader set of functionalities (including the use of headphones or speakers), the oscillator specifically focuses on generating the pure tones required for precise threshold measurement. Because audiometers may include multiple functionalities and features for comprehensive auditory testing, they do not serve as the sole tool for presenting tones in the same direct and focused manner as an oscillator does.