GARRF Dual-Phone SHM & Acoustic Suite (Transceiver / Receiver / Generator)

Operating Mode

60 FPS

Select Configuration

Mode 1: Outputs acoustic/structural signals up to 10 kHz (Use on Phone A).

Signal Generation

Frequency (Max 10 kHz) 440 Hz

20Hz 8kHz check 10kHz

Volume / Amplitude 50%

Receiver Timestamp & Sync (25cm Away)

Trigger Epoch: Not Triggered

Time-of-Flight (Est): -- ms (~25cm: 0.73ms)

FFT Parameters

FFT Resolution 2048

Peak Freq 0.0 Hz

Amplitude -∞ dB

Sample Rate 44.1 kHz

Sync Timestamp 000.0 ms

FFT Frequency Spectrum (0 - 10 kHz Hardware Limit View)

Optimized phone spectrum view focusing on structural & acoustic frequencies

0 Hz 5.0 kHz 10.0 kHz (Max Limit)

Time Domain Waveform & Arrival Tracking

Real-time signal capture across 25cm–50cm distance separation

Experimental Notes & User Guide (Built-in Transducers Only)

Mode 1: Generator Only

Uses 1 Phone (Phone A). Generates continuous tones, sweeps, or waveforms strictly capped at 10 kHz to respect smartphone acoustic speaker thresholds.

Mode 2: Receiver Only

Uses a separate Phone (Phone B) placed 25 cm to 50 cm away. Captures acoustic/vibration signals via microphone, logs arrival timestamps, and tracks time-of-flight.

Mode 3: Both (Transceiver)

Runs generation and live sensing simultaneously on a single device, or coordinates cross-device testing. Note: This experiment relies purely on built-in phone speakers and microphones; external jack connections will be integrated in a separate future experiment.