Sonar Ruler: Sound Distance

Sonar Ruler+ measures distance using sound wave echoes — like submarine sonar. The speaker emits a chirp pulse and the microphone detects the reflection to calculate distance. Watch the real-time waveform visualization showing the emitted pulse and returning echo, making this both a measurement tool and a physics education experience. Key Features: - Sound wave echo distance measurement - Real-time waveform visualization - Chirp signal + cross-correlation for precision - Auto noise gate for background filtering - Multi-measurement averaging (5 readings) - Temperature compensation for sound speed - Unit conversion (m/ft/in) - Measurement history No LiDAR or Pro model needed — works with any iPhone using pure acoustics.