Narrow transcription is a detailed method of transcribing speech sounds that captures the specific phonetic nuances of a speaker's pronunciation. It involves using phonetic symbols from the International Phonetic Alphabet (IPA) to represent not only the phonemes but also allophonic variations and diacritics, which provide insight into the speaker's accent, stress patterns, and any subtle articulatory details. This level of detail is crucial for analyzing the intricacies of spoken language and understanding how speech can vary between different speakers or contexts.