A speaker grille (or grill) is a protective cover placed in front of a loudspeaker driver, typically made from either a rigid or flexible material. Its primary function is to safeguard the driver and internal components from physical damage or foreign objects while allowing sound to pass through with minimal interference. Since the grille is positioned directly in the sound path, it inevitably affects acoustic performance. Therefore, its design must balance protection and sound transparency according to the intended application of the speaker.