Palindrome
The amazing thing about the Sonos logo is it not only a palindrome in terms of its letters “SONOS,” it is also palindromic by design. If you rotate the artwork 180 degrees, it is exactly the same. I tried it!
Palindrome: the characters read the same backward as forward. Some examples of palindromic words are redivider, deified, civic, radar, level, rotor, kayak, reviver, racecar, madam, and refer.