Final answer:
The metal strip used to join two acoustical tiles at the edges of a butt joint is called a butt joint strip, which ensures a seamless and effective acoustic connection.
Step-by-step explanation:
The thin metal strip inserted into the edges of two acoustical tiles to make a butt joint between them is known as a butt joint strip. This specialized component is designed to join acoustical materials smoothly and is crucial in soundproofing applications where the integrity of the acoustical seal is important. A butt joint strip ensures a clean, professional finish and continuous acoustical performance. While other terms such as "Metal connector" (Option 2), "Butt joint strip" (Option 3), and "Acoustical strip" (Option 4) might convey similar ideas, the industry-standard and widely recognized term is "Joint strip." This thin metal strip serves as a crucial element in achieving precision and cohesion in acoustical tile installations, reflecting the careful consideration given to both functional and aesthetic aspects within architectural and construction practices.