Excessive Volume
“The pedestrian safety speaker is so obnoxious! Way louder than your average gas car”
Vehicle acoustic alarm system
The quietest cars on the road
are now required to make noise.
This is what we think that noise should sound like.
Regulatory Mandate
THE SILENT VEHICLE PROBLEM
Electric and hybrid vehicles are nearly silent below 20 km/h.
AIS-173 requires them to speak up.
Category M & N
Passenger & goods EVs
Oct 2026 → Oct 2027
New models → existing models
AIS-173 · table 2
80
70
60
50
40
30
0
75 dB(A) max
Clause 5.2.9, Nov 2022 · pitch also shifts with speed, required by law
AIS-173 · FREQUENCY CONTENT REQUIREMENT
≤1600 Hz
At least 1 band required
800 Hz
>1600 Hz
Remaining band(s)
2500 Hz
160 Hz
1600 Hz
5000 Hz
Clause 5.2.8 · Mandatory 1/3-octave band frequency distribution from 160 Hz to 5000 Hz
Consumer Frustration
WHEN COMPLIANCE BECOMES NOISE POLLUTION
This isn't hypothetical. Most AVAS implementations meet safety requirements badly — a harsh, generic, siren-like tone that drivers find embarrassing and residents find intrusive.
Real complaints from drivers & residents
6 Verified Community Reports
No Speed Modulation
“I hate AVAS on my car. The system is lazily engineered with no adjustment to ambient noise level, no regard to current speed. Just a full blast speaker playing deafening tune louder than a revving ICE. Now I think garbage truck beep is music to my ears but it's For Safety. You can also honk all the way through the neighborhood see how safe it works.”
Neighborhood Intrusion
“I finished a device to quiet that terrible AVAS noise. It would wake up my neighbors because it was ungodly loud; my parking spot was right outside their window and in a garage so the noise bounced.”
DIY Muffling
“I wrapped my speaker in foam then in aluminum tape. Much quieter.”
Resident Complaints
“Yup this alien noise wakes up my neighbors and I get bitched at the next day about it.”
Sound Design
“I wish you could just change it to a different sound.”
Interactive Demo
HOW WE DESIGN IT
Move the speed slider to hear VINJEY AVAS pitch-shift in real time. Watch the frequency spectrum track AIS-173 compliance zones.
Sound Signature
AVAS OFF
Pitch & amplitude modulate continuously with speed.
Sound cuts off above 20 km/h — the AIS-173 / ECE-R138 operating ceiling (mandatory range: start-up to ~20 km/h).
0
km/h
0 km/h
AIS active zone · up to 20 km/h
30+ km/h
Live Frequency Spectrum — VINJEY AVAS Output
AIS-173 · 160 Hz – 5 kHz mandatory band
VINJEY AVAS signal
AIS-173 min SPL threshold
Mandatory frequency band
Value Proposition
AVAS · WHAT VINJEY BRINGS
Compliant
by Design
by Design
Brand
Character
Character
Speed-Aware
Real-Time
Real-Time
Verify
Commit
Commit
Your
Platform
Platform
Compliant by design
- Built to AIS-173 from the specification, not retrofitted to pass a test afterward.
Engineering Specifications
Technical Datasheet
StandardAIS-173 (India), UN R138, ISO 16256, FMVSS 141 (US)
Sound DesignProfessional sound design, engineered for AIS-173 compliance and calibrated for reliable output on cost-constrained speaker hardware
Speed InputMotor Hall-sensor pulses (primary); vehicle CAN bus where available
Frequency Range160 Hz – 5,000 Hz, per AIS-173's one-third-octave band requirement
Active Speed Range0–20 km/h forward; distinct reverse warning tone
StatusIn Development
Application Domains
Battery Electric Passenger Vehicles (BEV)
Plug-in Hybrid Electric Vehicles (PHEV)
Ready to engineer EV acoustic safety?
Partner with VINJEY to integrate compliant, brand-characterful AVAS sound synthesis IP — before your homologation window closes.