LIVE ACOUSTIC CHAT FEED
TWO-WAY ACOUSTIC LINK
[SYSTEM INITIALIZED] AirChat Acoustic Modem Ready. Position two devices 2–5 feet apart with speaker facing microphone. Activate Receiver Radar to listen!
▲ ACOUSTIC TRANSMITTER CONSOLE
04–07 · FSK ENCODER
PACKET LENGTH
11 bytes
CHECKSUM (XOR)
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BAUD RATE
10 BPS (100ms/bit)
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Preamble (16b) · Start Marker (8b) · Length (8b) · ASCII Payload · Checksum (8b) · End Marker (8b)
◉ DEMODULATOR RADAR & DETECTOR
02–07 · GOERTZEL DSP
DETECTED TONE
— Hz
SIGNAL STRENGTH
0%
DECODED BIT
–
SIGNAL ENERGY METER
DEMODULATION PIPELINE STAGES
FREQ
—
→
BIT
—
→
SYNC
—
→
BINARY
—
→
CHECKSUM
—
→
TEXT
—
—
No acoustic signal received yet
∿ LIVE AUDIO OSCILLOSCOPE & SPECTRUM
CANVAS AUDIO DSP
∿ TEST TONE GENERATOR BENCH
HARDWARE CALIBRATION
18500 Hz