You already know that children or teens can suffer from hearing loss from previous articles in “Beware, Hearing Loss Can Happen to Teens ..!“. The main component to note is the time and amount of sound intensity received by the ears of our children.
The ear is a sensory device that has the function of hearing the sounds around you so you can identify its existence. The ear is able to capture the vibrations of sound from the environment and turn it into an impulse in the nervous system and then translated by the brain.
The sound travels to the ear, and by the ear, the sound is collected and directs the vibration through the earhole to the eardrum.
The vibration of the sound that concerns the eardrum will cause the eardrums to shake.
Sound intensity is the amount of energy per unit time per unit area perpendicular to the direction of propagation. The sound intensity acceptable to the human ear has a limit. Sound intensity limits are as follows:
1) The smallest intensity that can still cause auditory stimuli in the human ear is 10-12 W / m2 at a frequency of 1000 Hz and is called the Hearing Threshold Intensity.
2) The greatest intensity that can still be received by the human ear without pain is 1 W / m2. Thus, the lowest hearing loss in humans is 10 -12 W / m2 and the highest hearing limit in humans is 1 W / m2.
The ear has a hearing limit that depends on the amount of sound and time period. The bigger the sound the hearing ability of the human ear is getting smaller.
Human Hearing Limit Table
90 dB 8 hours
92 dB 6 hours
95 dB 4 hours
97 dB 3 hours
100 dB 2 hours
105 dB 1 hour
110 dB 30 minutes
115 dB 15 minutes
There are several kinds of hearing loss that is influenced by the affected part:
Conductive hearing Loss.
Problems occur in the outer or middle ear associated with the delivery of sound. The cause of earwax accumulation, external ear infections, wounds on the eardrum and heredity. The conductive hearing loss may be medically cured.
Sensorineural hearing loss
Problems in the inner ear that is in the cochlea or hearing nerve. This type of disorder is generally caused by damage to the hair cells in the cochlea due to aging or damaged by a sound that is too hard. Hearing loss Sensorineural hearing loss is rarely medically resolvable, but hearing aids can be helpful.
Mixed Hearing Loss
Hearing loss conditions are conductive and sensorineural. Generally, people with this type of hearing loss can be helpful when using hearing aids.