What is audible range?

What Does audible range Mean

The notion of range is used with reference to the amplitude of a phenomenon, taking into account the variation that occurs between a lower limit and an upper limit . Audible , meanwhile, is what can be perceived with the ear (that is, heard).

The idea of audible range , in this framework, refers to all the frequencies that the ear of a human being is able to perceive . Also known as audible spectrum , sound audible or tonal field , there is a margin beyond the generalities, each individual varies and even through changes with age.

In a broad sense, it can be stated that a young person with a healthy ear has an audible range between 20 hertz ( Hz ) and 20 kilohertz ( kHz ). Therefore, any sound emitted between those frequencies can be heard by the subject.
When the acoustic wave has a frequency lower than 20 Hz , it is called infrasound . On the other hand, if the frequency of the acoustic wave exceeds 20 kHz , it is an ultrasound . In neither case is the sound perceived by the human ear since it is located outside the audible range.
It is important to note that the audible range does not just decrease over time . If someone is exposed to very loud sounds, they can seriously damage their hearing system, thereby affecting the width of the audible range. Therefore, those who carry out work activities in which loud noises are generated must protect their ears to avoid injuries.
When the audible range is affected by the passage of time, we speak of presbycusis , which is defined as the loss of hearing that occurs progressively and that mainly affects the high frequencies, starting with the range that is between 500 and 4000 hertz, which is generally associated with speech. The aging of the auditory nerve and the inner ear are the main reasons for this practically inevitable deterioration that we go through in old age.
During youth, and as long as there are no hearing-related health problems, our audible range is equivalent to ten octaves. In the field of music, we call the interval that comprises eight degrees of a musical scale an octave ; Although there are several types, in a nutshell we can say that on a piano an octave is the space between two keys of the same name (for example, "from DO to DO").

Continuing with the concept of octave, the audible range of the human being can be divided taking into account the tones that each group covers: the first four octaves are equivalent to the low tones , with frequencies between 16 and 256 hertz; the next three are the midtones , whose frequencies are between 256 and 2000 hertz; from there and up to 16,000 hertz are the treble tones , which extend over the last three octaves.
We often find ourselves with a confusion between the concepts audio and radio frequency : while the former refers to mechanical waves (it is not possible to propagate them in a vacuum), the second represents electromagnetic waves (they can propagate).
The audible range of humans , on the other hand, is different from the audible range of animals . The elephants , to mention one case, hear the infrasound , while bats detect ultrasound .
Otro aspecto a considerar es que, más allá de la frecuencia, lo que percibe el oído humano depende de la intensidad acústica. Los sonidos comprendidos entre 0 y 130 decibelios (dB) pueden ser captados, aunque aquellos que superan los 90 dB resultan dañinos.

Go up