Microsoft's Windows 95 startup sound was created by Brian Eno and became a significant part of the National Recording Registry. Other notable sounds include Apple's serene Mac startup sound, PlayStation's auditory experience, Sega's 'SEGA' chant, Nokia's ringtone derived from Francisco Tárrega’s Gran Vals, and AOL's "You've got mail" voice notification by Elwood Edwards. Today's sound landscape is cluttered, leading to alert fatigue, and modern designers face the challenge of creating distinct sounds adaptable to various environments. Effective sound design involves establishing a cohesive sonic language that resonates across contexts, prioritizing emotional connections, and recognizing the importance of silence. Brands like Mastercard and Netflix exemplify this approach by adapting core melodies for different markets while maintaining their identity. Sound should be treated as essential infrastructure, and brands need to monitor and refine their sonic strategies for effectiveness.