The parties often refer to the result of the negotiation as a collective bargaining agreement (CBA) or as a collective employment agreement (CEA).
When theyâre happy and satisfied they make a humming sound. This sounds like a blend of buzzing and humming. When in danger alpacas will sound an alarm which sounds a little like a horseâs whinny. And, as you now know, before mating alpaca stallions âorgleâ.
Humpback whales may also make stand-alone sounds that do not form part of a song, particularly during courtship rituals. Finally, humpbacks make a third class of sound called the feeding call. This is a long sound (5 to 10 s duration) of near constant frequency.