The picture below consists of several parts, decibel, frequency and guide line.
Frequency: The abscissa is the frequency (HZ), and the frequency is what we often call the pitch. Generally speaking, women have higher voices, and of course, some boys have sweet voices. Don't get me wrong, I am a serious person.
Decibel: The ordinate on the left is decibel, which refers to the size of sound. The higher the value, the louder the sound. For example, the decibel of the speaker is very high.
The results of basic hearing test are divided into four situations: normal hearing, conductive hearing loss, neurological hearing loss and mixed hearing loss.
First, hearing is normal.
The normal value of hearing is within 25 decibels, which is the green area in the picture. As long as the punctuation marks on your test results icon are within this range, then your ears are particularly healthy.
Second, conductive hearing loss.
Conductive hearing loss means that the bone conduction is in the green range, while the air conduction is outside the green normal range.
Conductive hearing loss often occurs in sound transmission channels, such as ear canal blockage. The bone conduction test can bypass this problem and directly transmit the sound to the auditory nerve of the inner ear through the skull. So if there is nothing wrong with the nerve, the hearing of bone conduction test is normal, and bone lead naturally falls in the green range.
Third, neurological hearing loss.
The conductor and the gas conductor are outside the green area, and they are still very close.
Neurotic hearing loss is due to neurological problems. Because whether it is bone conduction test or air conduction test, the final sound needs to pass through the auditory nerve of the inner ear. When the test results are similar, it means that the sound transmission channel does not affect the hearing. That leaves only neurological reasons.
Fourthly, mixed hearing loss.
Bone lead and air lead are both outside the acceptable range, but the distance is far away.
Bone conduction test results are not in the green range, indicating that it is neurological hearing loss. The result of air conduction test is even worse, which shows that not only the nerve is out of order, but also the sound transmission effect in the ear canal and other parts is not good, which belongs to conductive hearing loss.
Both cases are mixed hearing loss.