Modern Audioguide Icon Logo

I need a clean, modern-style logo that instantly communicates “audioguide”. I’m picturing a strong, memorable icon only—no accompanying text—worked up in a bold and vibrant palette that stands out well on both light and dark backgrounds. Feel free to explore abstract sound waves, a stylised ear, or a subtle map pin, as long as the final mark looks contemporary and scales beautifully from a mobile-app favicon to signage.

Please provide:
• An editable vector file (AI/SVG)
• High-res PNGs with transparent background
• A simple usage sheet noting exact colour values and safe-space guidance

The design will be accepted once the icon remains recognisable at 24 px, holds its clarity in monochrome, and the colours reproduce accurately in CMYK and RGB. I look forward to seeing your ideas.