Voice Input Icon - Audio Signal and Human Figure Symbol #190015 (License: Personal Use)

This minimalist black-and-white icon combines a classic sound wave graphic on the left with the Greek letter sigma (Σ) on the right, suggesting the mathematical summation of audio signals. The design implies concepts like Fourier analysis, audio synthesis, or digital signal processing where multiple frequency components are aggregated. Its clean vector style makes it suitable for UI elements, educational diagrams, or technical documentation.

Used in web pages about digital signal processing, audio engineering, machine learning for sound, or STEM education materials. Matches user intent seeking visual metaphors for audio computation, spectral analysis, or algorithmic sound manipulation.