The ship's speaker amplifies and emits audible sound waves. NauticExpo offers waterproof, built-in and pedestal speakers, among others.
Ship's speakers are used to make announcements to crew and passengers. Ship-wide distribution allows instantaneous diffusion of important messages. They are used to play background music on passenger ships to create a pleasant atmosphere.
Interior and exterior speakers differ. Those exposed to the weather are conical and made of corrosion-resistant materials. Some are waterproof.
Choice depends primarily on location and function. These factors will determine whether the speaker will be built-in, waterproof, etc.