What type of hearing test requires precise increments and patient responses to adjust volume?

The manual test is characterized by its requirement for precise increments in volume adjustments, as it relies heavily on the patient's responses to determine sensitivity. This type of testing typically involves an audiometer operated by the technician, who will present sounds at varying levels and observe the patient's responses to those sounds. The technician can systematically increase or decrease the volume based on the patient's feedback, allowing for a detailed assessment of the patient's hearing capabilities. This interactive process helps to accurately diagnose hearing thresholds.

In contrast, non-manual tests often do not involve direct interaction with the patient for volume adjustments, and tests like the auditory brainstem response are objectively measured through physiological reactions, making patient response irrelevant. Speech audiometry tests involve assessing the patient's understanding or ability to hear and repeat speech sounds rather than focusing on precise volume adjustments for threshold determination.