The marriage banns.
The act or process of posing a question or making a request.
A request, or petition.
That asks; that expresses a question or request.
To generate the high-frequency sound by allowing a speaker to cause vibration of the sound generator of a musical instrument connected by an amplifier to the speaker.
To provide informational feedback to.
To convey by means of specialized communications channel.
Critical assessment of a process or activity or of their results.
The part of an output signal that is looped back into the input to control or modify a system.
The high-pitched howling noise heard when there is a loop between a microphone and a speaker.