Answer: kaka~!
~ according to Wikipedia "This symbol (in English) sometimes means "approximately", such as: "~30 minutes ago" meaning "approximately 30 minutes ago".[2] It can mean "similar to",[3] including "of the same order of magnitude as",[4] such as: x ~ y" meaning that x and y are of the same order of magnitude. Another approximation symbol is ≈, meaning "approximately equal to."
Kaka may refer to:
People:
Kaká (Ricardo Izecson dos Santos Leite) (born 1982), Brazilian footballer
Kaká (footballer born 1981) (Claudiano Bezerra da Silva) (born 1981), Brazilian footballer
Kazimierz Deyna, (1947–1989), nicknamed Kaka, Polish footballer
Rajesh Khanna, (1942–2012), nickname Kaka, a Bollywood actor, film producer and politician
Kaka Hathrasi (1906–1995), Hindi satirist
Kaka Joginder Singh (1918–1998), Punjabi politician
Kaka Baptista, (1864–1930), Indian politician from Mumbai
Places:
Kaka, Golestan, a village in Golestan Province, Iran
Kaka, Turkmenistan
Kaka Point, New Zealand
Kaka, Central African Republic
Kaka, Togo
Parrots:
New Zealand Kaka, native New Zealand parrot
Norfolk Kaka, extinct parrot
Chatham Kaka, extinct parrot
Other:
KAKA (FM), a radio station (88.5 FM) licensed to Salina, Kansas, United States
Or are you referring to sound made by something?