What is the formula for effective masking in bone conduction testing?

The formula for effective masking in bone conduction testing is accurately represented by the equation EM = ACnte + OE. In this context, EM stands for effective masking, ACnte denotes the air conduction threshold of the non-test ear, and OE refers to the bone conduction threshold of the test ear.

This formula is used to determine the amount of masking noise that needs to be applied to the non-test ear to prevent it from participating in the hearing test. By adding the air conduction threshold of the non-test ear to the bone conduction threshold of the test ear, audiologists ensure that any sounds detected by the non-test ear do not interfere with the test results from the test ear, thus providing a clearer understanding of a patient's auditory capabilities.

Understanding this formula is essential for effective and accurate audiometric testing, as it helps in isolating the hearing thresholds of each ear, crucial when one ear may contribute to perceived sounds that should only be detected by the other.