Abstract
Acquired immunity to pharyngeal tonsil lymphoid tissue hypertrophies im-proves during childhood. Identifying and treating pharyngeal tonsil hypertrophy at an early stage is essential because hypertrophied tissues may occur sleeping and breathing disorders. Therefore, we propose a non-invasive method for detecting pharyngeal tonsil hypertrophy using speech. In an acoustic analysis, the symptoms of adenoid hypertrophy and nasal obstruction are found to be similar, making their discrimination challenging. In addition, it is necessary to consider the effects of nasal obstruction or not in a nasal cavity with an adenoid. This study focuses on the frequency response caused by adenoid hypertrophy and nasal obstruction as different transfer function characteristics are ex-pected. Adenoid hypertrophy and nasal obstruction change the shape of the vocal tract – which is an acoustic tube – affecting the resonance and anti-resonance frequencies. This paper describes an experiment investigating the effects of adenoid hypertrophy and nasal obstruction using a Mel-filter bank. The results confirmed that changes in the Mel spec-trum are due to adenoid hypertrophy and nasal obstruction.
| Original language | English |
|---|---|
| Pages (from-to) | 1285-1289 |
| Number of pages | 5 |
| Journal | ICIC Express Letters, Part B: Applications |
| Volume | 13 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Dec 2022 |
Keywords
- Adenoid hypertrophy
- Mel-filter bank
- Nasal obstruction
- Transfer function