| Budget Amount *help |
¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2016: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
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| Outline of Final Research Achievements |
The study of the auditory system using bone-conduction hearing demonstrated that the upper frequency limit of about 20 kHz in human air-conduction hearing is determined by the tonotopic limitation of the cochlear amplification function.
Then this method suggested that the age-related hearing loss, known as presbyacusis, is caused mainly by the deterioration of the cochlear amplification function from the highest audible frequency region. Furthermore, it was also suggested that the change of the bone-conduction pitch perception characteristics in the high frequency range can play a role as a biomarker showing the course of the early age-related hearing loss, i.e. presbyacusis.
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