How much less is binaural MCL compared to monaural MCL?

The difference between binaural MCL (Most Comfortable Level) and monaural MCL reflects how sound perception is influenced by using both ears compared to just one. In general, when sound is presented through both ears, the perception of loudness can be enhanced due to the auditory system's ability to utilize the additional auditory input, resulting in a better integration of sound.

Research and clinical practices show that binaural MCL typically aligns with a reduction of about 5 dB compared to monaural MCL. This amount is based on the physiological understanding of how sound localization and loudness perception work. The auditory system processes sounds more efficiently with bilateral input, leading to the ability to perceive sounds as being sufficiently comfortable at a lower intensity level than when using one ear alone.

Thus, when determining the difference in these measurements, the typical value of 5 dB illustrates a balance between improving sound reception and maintaining listening comfort without overstimulating the auditory pathways when both ears are engaged.