What are the two tools that can be used for biological calibration?

Biological calibration in audiology often refers to the process of ensuring that audiometric equipment provides accurate readings by comparing them against subjective judgments made by a human listener. Human listeners can provide valuable feedback on sound quality, loudness perception, and frequency discrimination, which are crucial in calibrating audiological equipment properly.

While bio-acoustic simulators, digital recorders, and sound level meters are important tools in the field for various other applications—such as sound analysis or measurement—they are not directly involved in the process of biological calibration. A bio-acoustic simulator might be used to generate standard stimuli, but it does not account for individual variability in hearing and perception the way a human listener does. Digital recorders and sound level meters, on the other hand, are primarily for recording sounds and measuring sound pressure levels, respectively, rather than providing biological validation of those sounds in relation to human perception. Thus, using a human listener is a direct method to ensure that the audiology equipment is functioning correctly and is aligned with human auditory perception.