(July 8, 2019 at 11:55 am)onlinebiker Wrote: Darwinian selection continues.
An idea - manufacturers need to develop a ultrasonic transponder - that could be standard frequency range (with differences) and amplitude ----
The blind could have a hearing aid that hears that ultrasonic transponder and drops it to an audio frequency that a blind user could hear. If done stereo - the user could learn to predict vehicle speed and direction by amplitude and the doppler shift.
Having slight differences in transponder freq would allow the user to hear more than one vehicle at a time.
All without adding to existing noise levels.
