What does binaural squelch improve when wearing two hearing aids?

The correct answer highlights that binaural squelch significantly improves the signal-to-noise ratio in noisy environments when using two hearing aids. Binaural squelch refers to the ability of the auditory system to suppress background noise more effectively when sound input is received from both ears compared to just one. This is particularly beneficial in complex listening situations where background noise might interfere with the clarity of speech.

When two hearing aids are used, they work together to differentiate between the target sound (such as speech) and background noise. This enhances the listener's ability to focus on desired sounds while filtering out unwanted noise, which is especially crucial in settings like crowded restaurants or social gatherings.

While the other options address important aspects of hearing, such as sound localization and frequency discrimination, they do not specifically relate to the unique advantage provided by binaural squelch in challenging auditory environments. Volume adjustments relate to the amplification levels rather than the perceptual processing facilitated by using both ears.