one can hear, it is audible, you can hear
audibly
they say, it is said, it is rumoured
По слу́хам там спрятан клад.
It is rumoured there are treasures hidden there.
Хо́дят слу́хи, что возле Шанха́я ви́дели косми́ческий кора́бль.
It is rumoured that a spaceship has been seen near Shanghai.