popufare/experiment/sound

Sound Experiments

2020-02-10

The Driver Interface Units (DIUs) and Passenger Interface Units (PIUs) on the buses need to be audible to drivers and passengers when accepting or rejecting passes.

This document collects some data about the ambient noise, the sound level of the legacy system and experiments with the replacement system.

System Type	Typical dB	Button dB	Accept dB	Reject dB
Ambient on Bus	70-80
Legacy System	95	97	95	95
v Acorn Squash	80	74	82	82
v Alfalfa Sprout	85	89	90	80