"It Doesn’t Matter Where You Stand": The Importance of Positioning in Sound Quality
The popular belief, “It doesn’t matter where you stand,” when using a microphone, is a misconception that can lead to a range of sound quality issues. The truth is, your position can greatly influence the acoustics of a live performance or recording session. This is especially true when using a Public Address (PA) system, where the location of the speakers and microphones directly impact the overall sound quality.
Positioning On Stage
Speakers are generally assumed to remain on stage, and sound tests are conducted with this assumption in mind. The technician or sound operator establishes the sound balance based on the position of speakers and microphones on the stage.
The acoustic response of the whole PA system can change drastically if one or more microphones are taken off-stage. This change alters the spatial distribution of sound, which can lead to unwanted acoustic feedback. Acoustic feedback is especially likely when the microphones pass right in front of the loudspeakers, generating a loop of amplified sound that can create a high-pitched ringing or squealing noise.
Off-Stage Microphone Use
If the microphones are meant to be used off-stage, it is crucial to inform the technician or operator in advance. This allows them to adjust the PA system appropriately, mitigating the risk of unwanted acoustic feedback and ensuring the sound quality remains optimal.
Microphone positioning off-stage requires careful planning. The technician must account for the increased distance between the microphone and the PA system, as well as potential interference from other sound sources or reflective surfaces. The operator should also consider using directional microphones, which can focus on the intended sound source and reduce the pickup of unwanted noise.
Tips for Effective Microphone Positioning
Communicate with Your Technician: Always inform your technician or sound operator if you plan to use the microphones off-stage. This gives them time to adjust the PA system and perform additional sound checks if necessary.
Avoid Direct Paths to the Loudspeakers: Minimizing the microphone’s direct line of sight to the loudspeakers can help reduce the risk of feedback.
Use Directional Microphones Off-Stage: These microphones can focus on the intended sound source and reduce the pickup of unwanted noise or echoes.
Practice & Experiment: The best way to understand how your positioning affects the sound is through practice and experimentation. Try different positions and monitor how the sound changes.
