Sound / Research draft

Defining events for transport sounds

OTI's sound study distinguishes network identity, attention cues and information about an event. Its proposed record identifies the confirmed event and essential message before attaching an optional sound.

Selected findings

Documented uses of sound

The cases include network signatures, attention cues, spoken information and operational signals. The study distinguishes their purposes and stated meanings.

Speech and local conventions

RATP describes intonation differences for approach and arrival. TransLink documents rising tones for closing doors; that history gives the contour a specific local context.

Access to the message

The study separates recognition of a cue from receiving the essential message and completing a passenger task. These require different evidence.

From evidence to design

OTI proposals

The original OTI-A03 Next stop score is paired with an amplitude envelope derived from its actual prototype WAV. It is labelled as an unvalidated non-safety cue. The composition makes no claim of passenger testing or universal musical meaning. — Score for the original OTI-A03 Next stop research cue and amplitude envelope derived from its WAV. The non-safety prototype has not received musical or passenger validation.

A confirmed event record

Connect state, relevant service, time, validity and essential message before attaching a sound.

Candidate cue families

Contour, Pulse and Voicing explore five non-safety meanings. The research includes a neutral cue and proposes a comparison with no added cue.

Musical and task evaluation

Review the music and prepare comparisons of correct action, message access, learning and repeated exposure before field use.