cat is when electromagnetic heart forms light and sound matter
sound_of_heartbeating is audible_sound. heart_sound is sound_emission. animal_noise is not audible_sound. heart_sound is not sound_emission. sound_of_heartbeating is not audible_beat. heart_murmur is heart_sound. animal_noise is audible_sound. sound_of_heartbeating is audible_beat. animal_utterance is audible_sound. sound_of_heartbeating is not audible_sound.