A model of the occlusion effect with bone-conducted stimulation
2007 (English)In: International Journal of Audiology, ISSN 1499-2027, Vol. 46, no 10, 595-608 p.Article in journal (Refereed) Published
An acoustical model using simplified ear anatomy was designed to predict the ear-canal sound pressure occlusion effect in humans. These predictions were compared perceptually as well as with ear-canal sound pressure occlusion effect measurements using a foam earplug with shallow insertion, a foam earplug with deep insertion into the bony part of the ear canal, and a circumaural earmuff. There was good resemblance between model predictions and ear-canal sound pressure measurements. It was also found that all occlusion positions, even deep ear-canal occlusion, produced noticeable occlusion effects. With the bone-conduction transducer at the forehead, the perceived occlusion effect was close to that obtained from ear-canal sound pressure data in the 0.3 to 2 kHz frequency range, when the stimulation was at the mastoid the difference between the perceived and measured ear-canal sound pressure occlusion effect was around 10 dB at frequencies below 1 kHz. Further, the occlusion effect was obtained in two clinical settings: with supra-aural earphones (TDH39), and insert earphones (CIR22). Although both transducers produced occlusion effects, insert earphones produced a greater effect than surpa-aural earphones at the low frequencies. © 2007 British Society of Audiology, International Society of Audiology, and Nordic Audiological Society.
Place, publisher, year, edition, pages
2007. Vol. 46, no 10, 595-608 p.
Occlusion effect, Bone conduction, Acoustic model
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-39484DOI: 10.1080/14992020701545880Local ID: 48945OAI: oai:DiVA.org:liu-39484DiVA: diva2:260333