Whistle Icon - Free Vector Graphic for Sports, Referees, and Alerts #312322 (License: Personal Use)

This stylized yellow whistle features a smooth gradient from golden-yellow to pale yellow, with bold black outlines for strong visual contrast against dark backgrounds. The design is simplified yet instantly recognizable, emphasizing function over realism, making it ideal for digital interfaces and infographics. Its flat vector aesthetic ensures scalability without quality loss.

Used in sports websites, referee training materials, safety protocol guides, mobile app icons, and alert systems where a whistle symbolizes authority, start/stop commands, or emergency signaling. Matches user intent for quick visual identification of auditory signaling tools.