Hear IT - hearing diseases hearing aids ‘Hear-it’ –A non-commercial website dealing with issues on hearing loss and hearing impairment
hearing aids‘Hear-it’ –A non-commercial website dealing with issues on hearing loss and hearing impairment.[hearing diseases] [hearing aids] [hearing disorders] [hearing impaired children] [hearing impairment] [hearing aids] [HOME] |
of a sound increases as the number of cycles per second increase. Vibrations between 20 and 20,000 cycles per second are interpreted as sound by a normal healthy person. A high-pitched sound could be a piccolo flute hearing aids or a bird singing. Low-pitched sounds could be thunder heard from far away or tones from a bass guitar.
aaltazxghearing aids
DeciBel (dB) The term dB (deciBel) and the dB scale is used all over the hearing aids world for the measurement of sound levels. The deciBel scale is a logarithmic scale where a doubling of sound pressure corresponds to a 6 dB increase in level. It is very important to realize that the term hearing aids ’dB’ can have different meanings and is not a fixed value like the volt or the meter etc. The value of a dB depends on the context in which it is used. hearing aids Very often sound pressure is expressed either in dB SPL, where the weakest sound which a normal hearing person can decect is 1000 Hz or in dB HL which corresponds to the normal hearing threshold of a specific sound, (e.g. from 125 hearing aids Hz to 8000 Hz), 0 dB SPL and 0 dB HL are therefore not the same. 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 [Email: info@hear-it.org] |