For threshold measurement, the duration of each tone presented should be approximately how long?

In threshold measurement for hearing assessment, the standard duration for each tone presented is approximately 2 seconds. This duration is optimal because it allows the listener adequate time to properly perceive and respond to the sound without feeling rushed. A tone that lasts around 2 seconds provides a good balance; it is long enough for the listener to determine their ability to hear the sound at a specific intensity level, while not so long that it might lead to listener fatigue or confusion about the threshold being tested.

Shorter tones, such as those lasting 0.5 seconds, may not provide enough time for the listener to accurately respond, which could lead to inaccurate measurements. On the other hand, longer tones, like those lasting 5 or 10 seconds, might cause unnecessary strain or lead to variations in responses due to listener fatigue, potentially compromising the results of the threshold measurement. Thus, 2 seconds is widely considered a standard and effective duration for tone presentation in threshold testing.