A tram-depot wayfinding booth keeps hearing “car barn” as “carbon.” Staff can add a small site vocabulary on Riva ASR or leave the stock model. When is a customization experiment justified?
Select an answer to reveal the explanation.
Short Explanation
If the booth keeps mangling the same local phrase, teach Riva that phrase — do not rebuild the whole ear from scratch. Vocabulary customization is the right small experiment.
Full Explanation
A tram-depot wayfinding booth that keeps hearing “car barn” as “carbon” justifies a customization experiment when repeated domain terms cause recognizer errors, so vocabulary customization on Riva ASR is the trial. Civic transit kiosks serve riders with local jargon; teaching Riva those site words is the proportional fix without full acoustic retraining. That keeps public wayfinding accurate while staying inside associate speech customization practice.
Retraining acoustics from scratch on all depot noise whenever leadership wants fails by escalating to a full acoustic rebuild when vocabulary customization addresses repeated domain-term errors. Replacing Riva with a generic chatbot that ignores speech fails by abandoning recognition entirely. Waiting until the booth also needs a new diffusion model for tram posters fails by coupling an unrelated image-generation project to the ASR vocabulary gap.
Exam caveat: repeated site-phrase errors justify Riva vocabulary customization—not chatbot swaps or poster diffusion. Operational check: collect utterances containing “car barn,” add the term to Riva vocabulary, and compare recognition of that phrase on held-out depot audio before wider rollout.