What is a lavalier microphone primarily used for?

A lavalier microphone, often referred to as a lapel microphone, is primarily used to be attached directly to a speaker's clothing, allowing for hands-free operation. This design enables the microphone to pick up the speaker's voice clearly while keeping the microphone discreet and out of the way, which is particularly useful in interviews, presentations, and on-stage performances. The convenience of being clipped onto clothing helps ensure that the microphone stays in a consistent position relative to the speaker's mouth, maintaining consistent sound levels and reducing background noise.

The other options describe functions or uses that do not align with the primary purpose of a lavalier microphone. Enhancing sound quality in studio recordings typically involves larger, more specialized studio microphones rather than a lavalier. Connecting multiple microphones simultaneously would require a mixer or an interface designed for that purpose, which is not the function of a single lavalier microphone. Converting analog signals to digital is associated with audio interfaces or digital recording equipment, rather than the lavalier microphone itself, which usually captures audio in an analog format before any conversion occurs.