Hear IT - hearing disorders hearing damages ‘Hear-it’ –A non-commercial website dealing with issues on hearing loss and hearing impairment
hearing damages‘Hear-it’ –A non-commercial website dealing with issues on hearing loss and hearing impairment.[hearing disorders] [hearing damages] [hearing impaired children] [hearing impaired relatives] [hearing loss] [hearing damages] [HOME] |
etc. The value of a dB depends on the context in which it is used.
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Very often sound pressure is expressed either in dB SPL, where the weakest sound which a normal hearing person can decect hearing damages is 1000 Hz or in dB HL which corresponds to the normal hearing threshold of a specific sound, (e.g. from 125 Hz to 8000 Hz), 0 dB SPL and 0 dB HL are therefore not the same. hearing damages Examples of different sound intensities as expressed in dB(HL): 180 dB: Rocket at take-off 140 dB: Jet engine at take-off 120 dB: Rock band 110 dB: Loud thunder 90 dB: City traffic 80 dB: Loud radio hearing damages 60 dB: Ordinary conversation 30 dB: Very soft whisper 0 dB: Softest sound a person can hear Defining hearing loss Hearing loss is often classified by means of different categories. hearing damages The same definitions are not always used, but the following are among the most common. Mild hearing loss On average, the most quiet sounds that people can hear with their better ear are between 25 and 40 dB. People hearing damages who suffer from mild hearing loss have some difficulties in keeping up with conversations, especially in noisy surroundings. Moderate hearing loss On average, the most quiet sounds heard by people with their better ear are between 40 and 70 [Email: info@hear-it.org] |