Microspeaker sensitivity can be quite low. This technique is also common to both headphone and dynamic mike elements. This doughnut shaped diaphragm often has molded-in tangential creases for anti-rocking and stiffness. The voice coil is located at the dome/dust cap and the outer ring of the surround forms the compliance. Microspeakers use a fabric or film diaphragm without a separate dust cap, and do not use a spider. All this while maintaining a cost range from $0.25 to less than $1 for most types. Today, the challenge is for the 1″ to 2″ diameter microspeaker to reproduce natural voice and music, have reasonable sensitivity and power handling, and be able to reach satisfactory sound levels. The need for small extended range speakers is being driven by laptop computers, hands-free car kits, portable players, mobile Internet devices, and smartphones. The goal of this article is not to teach how to design a good microspeaker, but rather to provide information on how to design a good mobile audio system, touching upon speaker design and speaker enclosure techniques. Adequate amplifier power with low power consumption and low heat “Line of sight” between the front of the speaker and the listenerĥ. Good speaker sensitivity for low battery drainĤ. While these goals might seem modest, there are another half-dozen conflicting requirements that result in few mobile audio products actually succeeding in satisfying these goals.ģ. The function of the sound system is clear, intelligible speech communications and aesthetically pleasing music. A key concept to understand is that there is an audio reproduction system in these products.

Audio sound quality optimization in a smartphone, mobile device, display, or laptop computer is the focus here.

Small speaker enclosure design