The Phonetic Corpus of Estonian Spontaneous Speech consists of recordings that have been annotated on different linguistic tiers including words and segments and their boundaries in the speech signal. The corpus mainly contains dialogues. The corpus can be used for studying different phonetic and linguistic research questions and for training various language technological applications (e.g. speech recognition, dialogue systems). In addition to the detailed phonetic segmentation the corpus has word-level annotation uses standard orthography so the corpus can be used with most NLP tools built for written language.

The corpus includes: - Studio quality sound recordings, separate channels for each speaker; Spontaneous conversation between 2-3 speakers, approximately 30 minutes for each recording; - Manual transcription of words and phonemes; - 207 individual speakers in the age range of 20–85 years; - A total of 135 hours of speech recordings; - Word & phoneme level annotation of 106 hours / one milion word level intervals.