NEC: Speaker Selective Cancellation via Neural Enhanced Ultrasound Shadowing
NEC is a light-weight, AI-augment microphone jammer system. Unlike the commercial microphone jammers that jam all involved users and hence being prohibited and unlawful(violation of 47 U.S.C 333) in public usage, our NEC offers a selective speaker jamming service to inhibit microphones from capturing a targetd speaker's voice.
Features
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How does NEC work?
NEC uses a trained deep learning model to seperate speaker's voice and generate the shadow wave to cancel/overshadow Bob's voice on attacker's microphone while not impact Alice's communication.
What devices can be superposed via Inaudible Wave Piggyback?We validated successful NEC on the following devices, and we believe more devices could be vulnerable.
Manufacturer Model Carrier fc(kHz) Distance (m) Apple iPhone 7Plue 21-29 0.49 Apple iPhone SE2 23-28 1.77 Apple iPad Air 3 27-32 3.72 Xiaomi Mi 8 Lite 24-32 1.65 Xiaomi POCOPHONE 22-29 0.7 Samsung Galaxy S9 25-31 3.64
What can the NEC do? - ★ Hide your voice in the public (with only 3 enroll voices)
- ★ Prevent your voice be recorded by eavesdropper
- ★ Removing your voice passively while keep others recording normally
- ★ And much more...
NEC demonstration
Hide bob's voice while retaining Alice's voice on Alice's phone.
Bob and Alice talk simultanously
Only Alice's voice is kept
Bob and Alice have a conversation
Only Alice's voice is kept
Hide Bob's voice on Attacker's recorder while retaining others' voice.
| Bob and Alice talk simultanously | Only Alice's voice is kept |
| Bob and Alice have a conversation | Only Alice's voice is kept |
| Bob's talk in the cloud with human noise | Attacker can only record human noises |