Distance between two corresponding points of a sound wave, often measured in meters.
The length of a wave, measured from any point on a wave to the corresponding point on the next phase of the wave.

Silent disco is a unique event experience where attendees wear wireless headphones to listen to music or presentations, eliminating the need for traditional loudspeakers. Multiple music channels or presentations can be transmitted simultaneously, allowing attendees to choose their preferred audio content. Silent discos are often used in situations where noise restrictions exist or to provide personalized audio experiences in a shared space.

Lapel Microphone, also known as a lavalier microphone, is a small microphone that can be clipped to a person's clothing for hands-free use.

Series of audio and video solutions for AV setups and live performances.

The opposition that an electrical circuit offers to the flow of alternating current (AC).
The amount of opposition a device has to an audio signal. In technical terms, the combined effect of capacitance, inductance, and resistance on a signal.

Series of microphones and audio solutions for AV setups and live events.

Meter used to indicate the peak level of an audio signal.
An audio level meter.

Manages the main audio console and sound system to mix and balance the live sound for the audience.