yes
They can not hear each other through the natural environment due to there being no medium for the sound waves to travel through. However, they can hear each other through the use of radio communication.
Bats can hear every thing around them
They are homophones of each other.
your ears
Yes, bats can hear humans. Bats have excellent hearing abilities, which are crucial for their echolocation system. Their hearing is more sensitive and specialized compared to many other animals, allowing them to navigate and hunt in the dark using sound waves.
If you are trying to ask .... " If they can hear us then its yes and no" However fish can communicate with EACH OTHER.
You hear cats meowing outside because they are communicating with each other or trying to get attention from humans or other animals.
Vampire bats use echolocation, but they can hear what we hear, and more. They have an acute sense of hearing in the high frequency range, detecting up to 113 kHz, compared to the average human's hearing which can comfortably detect up to about 17 kHz. Vampire bats use this high frequency, or ultrasonic, hearing to analyse echolocation, meaning the echoes of their biosonar calls. Vampire bats are different from other bats in that they also have exceptional low frequency hearing. For audio clips on what vampire bats can hear compared to humans and to other bats, see the related link below.
Astronauts can hear each other's voices when their helmets are touching because sound can be transmitted through solid materials, such as the helmet's surfaces. When one astronaut speaks, the vibrations of their voice travel through the helmet and into the other astronaut's helmet, allowing them to hear each other despite the vacuum of space surrounding them. This method of sound transmission is similar to how people can hear each other when they are connected by a solid object, like a wall.
They were improved because they couldn't hear each other
sometimes but not usally
As there is no air , it is difficult , but astronauts use radios.