Speaker grille

A speaker grille (or speaker grill) is a hard or soft screen found on the front of many consumer and industrial loudspeakers, mounted directly over the face of the speaker driver. Its main purpose is to protect the driver element and speaker internals (and possibly other audio components) from foreign objects while still allowing the sound to pass clearly. Small fabric membranes are commonly used in mobile phones and earbud headphones to protect loudspeakers and microphones. Similar to grilles on larger audio systems, these membranes safeguard against moisture, contaminants, pressure fluctuations, and physical intrusion.

The grille or membrane interacts with the sound produced, as it lies in the path between the loudspeaker and the listener. To ensure minimal impact on sound quality, the reduction in sound—referred to as transmission loss—must be quantified. While more robust grilles offer greater protection, they also result in higher transmission loss, requiring a balance between protection and sound quality to be achieved based on the specific application.