WHY do people with hearing loss put the palm of their hand to | Why?

WHY do people with hearing loss put the palm of their hand to their ear?

The inside of the palm acts as a concave mirror that concentrates sound waves coming from the front. The back side weakens the noises coming from behind.

However, such an effect is only clearly expressed for sounds with a frequency of more than 800 Hz, due to the small size of the palm. It is much higher than the human voice, but the palm enhances overtones with a frequency up to several kilohertz, which may slightly improve speech perception.

Still, if your hand is constantly reaching for your ear, better consult a doctor.