How does phonetic transcription help show pronunciation more accurately than ordinary spelling?

Phonetic transcription provides a more accurate representation of speech than ordinary spelling because standard orthography is often conservative and inconsistent, failing to account for shifts in pronunciation over time or the nuances of spoken language.12

Ordinary spelling often suffers from "disharmonies" where a single sound is represented by multiple symbols (e.g., seize and seas) or a single symbol represents multiple sounds (e.g., the x in fox). Furthermore, standard writing often retains silent letters from historical pronunciations, such as the k in knight, which no longer reflects modern speech.12

In contrast, phonetic transcription—most notably the International Phonetic Alphabet—is designed to provide a unique, unambiguous symbol for each distinct sound, or phoneme. It allows for varying levels of precision:3
* Broad transcription captures the essential phonemic units of a language.41
* Narrow transcription uses diacritics and other marks to denote specific phonetic details like aspiration, vowel length, or tone, which are essential for linguistic study, language learning, and clinical documentation.413

By sidestepping the inconsistencies of conventional orthography, phonetic transcription provides a reliable tool for documenting the precise form of spoken utterances.32