Silence!
The overwhelming sounds had completely disappeared and Mako could not hear anything now. He looked at the prompt in front of his eyes with massive gratitude because he didn't even know that the system could do something like this.
At first, it might seem scary, considering Mako knew very little about the system and he didn't know what other functionalities it had hidden from him. If the system could temporarily block his sense of hearing, then what else could it also block? His sight? His heartbeat?
However, Mako didn't have any such thoughts in the given situation as he was just so happy to not hear that constant creepy noise. Now that Mako was unaffected by the sound, he stood up once again and started Analyzing his surroundings, trying to find the source of whatever was causing this.