Low Profile, Durable Micro Speakers
CUI has developed a line of micro speakers specifically intended for products with small diameter requirements. The speakers have a low profile design and come with mylar cones for increased durability, making them ideally suited for use in headset and handheld applications. Several waterproof models further carry Ingress Protection (IP) ratings of IP67 for applications that deal with moisture and environmental contaminants.
https://www.cui.com/micro-speakers
