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Third-octave sound analysis was performed on the snoring sounds of nine subjects with obstructive sleep apnoea (OSA) and 18 with simple snoring. Both groups demonstrated a large low frequency peak in linear sound levels at around 80 Hz. However, the OSA group displayed a substantially larger high frequency sound component. We utilized this fact in the development of an acoustic index (Hawke Index: HI) which describes the ratio between the overall A-weighted and linear sound levels for the recorded snoring sound of each subject [HI = dB(A)/dB(SPL) for Lmax]. There was a significant positive correlation between the apnoea/hypopnoea index and the HI (r = 0.73, t = 5.3, 25df, P < 0.001). If a value of 0.90 or greater was taken as diagnostic of OSA, the HI exhibited 67% sensitivity, 100% specificity, 100% positive and 86% negative predictive accuracy. With further development, we believe this acoustic phenomena may have a role as a screening test in the diagnosis of OSA.
A W McCombe, and
V Kwok, and
W M Hawke
June 1995,
International journal of pediatric otorhinolaryngology,
A W McCombe, and
V Kwok, and
W M Hawke
January 2017,
European respiratory review : an official journal of the European Respiratory Society,
A W McCombe, and
V Kwok, and
W M Hawke
October 1990,
The European respiratory journal. Supplement,
A W McCombe, and
V Kwok, and
W M Hawke
January 2015,
IEEE journal of biomedical and health informatics,
A W McCombe, and
V Kwok, and
W M Hawke
February 1994,
Monaldi archives for chest disease = Archivio Monaldi per le malattie del torace,
A W McCombe, and
V Kwok, and
W M Hawke
March 2020,
Breathe (Sheffield, England),
A W McCombe, and
V Kwok, and
W M Hawke
July 1990,
The European respiratory journal,
A W McCombe, and
V Kwok, and
W M Hawke
February 2018,
Clinical medicine (London, England),
A W McCombe, and
V Kwok, and
W M Hawke
February 2010,
Internal medicine journal,
A W McCombe, and
V Kwok, and
W M Hawke
January 2010,
Anaesthesia and intensive care,
