Try typing a finding with nitrile gloves on, or standing in a generator room at eighty decibels, or balancing a clipboard in a walk-in freezer. Field audits are a physical activity; keyboards are a desk activity. Voice capture bridges the gap.
The two flavors of voice
Speech-to-text turns spoken notes into text on the spot - useful for narration-heavy checklists where the auditor prefers talking to typing. The other, and the more powerful one for evidence, is a short audio recording with a hard duration cap: the auditor speaks their observation into the device, and the clip - tone, emphasis, and all - is stored with the answer. There is deliberately no video in the design: video is heavy, privacy-invasive, and rarely reviewed; audio captures the essence of an observation at a fraction of the cost.
Where it earns its keep
The classic scenarios: maintenance engineers inspecting equipment with both hands occupied; construction supervisors walking a site, dictating to a phone in a pocket; food-safety officers recording temperature anomalies while moving between chillers; auditors with gloves, in dust, rain, or cold. In each case, voice turns what would have been a post-hoc memory written later - or not at all - into a first-person record made at the moment.
How it survives review
Audio evidence gets the same treatment as every other answer type: files stored server-side with capture timestamps, attached to their checklist item, playable from the report. A reviewer listening to thirty seconds of an auditor's voice - "the seal on bay three is cracked, photos attached" - understands a finding faster than any typed summary. For non-conformance disputes, the recording is a witness statement in the auditor's own words, which is why it is routinely the difference between a contested finding and an accepted one.
The discipline
The form should stay short - a hard cap keeps the library reviewable and the storage bill sane - and checklists should mix voice with structured fields rather than replace them. A spoken observation plus a conforming answer plus a photo is a complete record. Voice alone is not.
Field auditors should be capturing what they see, not translating it for a keyboard. The year's best audit tooling is the kind that gets out of the way - and nothing gets out of the way like speaking.