Sounds, especially in a particular environment or as produced by a particular source.
Sonics can be pleasant or unpleasant, loud or quiet, clear or muffled.
Examples:
The sonics of the forest are very peaceful.
The sonics of the city can be very loud.
She doesn't like the sonics of the crowded room.
The sonics of the concert were amazing!
The sonics of the thunderstorm were terrifying.
The sonics of the ocean are so calming.