First, the human hearing range is the pitch or frequency of sounds that we can hear. It varies from very low frequency directions, which sound low for us, to high frequency directions that sound high.
If a voice was outside of this reach, it would be on a field that speaks so low that we cannot imagine how that would even sound. On the other hand, if a voice is a frequency higher than the human audible range, then it would be past any piercing high-pitch sound that we have ever heard.
There are many cases in which an EVP has been recorded where the person who plays it and revised the audio recognized the voice as someone they know. A factor that makes our individual voices recognizable is the frequency that we speak to, it determines how low or high our voice is.
When a voice is recorded using a camera or audio recording device, the frequency of our voice remains unchanged in the recording. This tells us that a recording device perfectly retains the pitch of every voice it takes. Therefore, if a recording device was able to conquer a voice outside the human hearing range, if it is played, it would be unchanged and still be past the frequency range of the ear – it would remain inaudible.
This means that if an EVP is heard in a recording, it is not outside the human hearing range and is never and there is no reason to think that this is the case. If the sound was not heard when the audio was admitted, but appeared in the recording on a number of supernatural means, then this is exactly what an EVP is – a mysterious voice that was recorded on a recording that was not heard at that time. The exact mechanism of how the sound is absorbed is not understood, but because the recording device would not change the pitch anyway, we know that it could not have been outside the human hearing range – it was simply unheard of at the time.
This does not mean that the idea of capturing sounds that we cannot hear is a ridiculous, it just means that it is not easy to do. Microphones, as you would find in a smartphone, camera or digital audio recorder, are designed to record what the human ear can hear, everything behind it is simply unnecessary data that is not audible for us in playing the recording.
Even if a microphone had a wider frequency pick-up, the recording company would ignore all sounds outside the human audible range, because it also wants unnecessary data, especially in the case of digital audio when keeping the file sizes low is important.
One of the most popular recording formats, and the one used in digital audio recorders who are often used to capture EVPs, is the WAV file. It is called a ‘loss -free format’, which means that the stored audio is an accurate representation of the original sound without losing audio quality.
To become technical, your audio recorder records audio packages, usually 44,100 per second, this number of details gives it the capacity to record the entire audible frequency range from 20Hz to 20 kHz. It will not waste means with the recording of sounds that go further because they would be inaudible.
However, if you suspect that there are noises in the paranormal world that can exist outside of our hearing range and that you want to try to catch them, then there is nothing to prevent you from investigating this further, but you need a number of highly specialized recording equipment. The required equipment is different, depending on whether you want to record low -frequency sounds or high -frequency sounds.
Ultra-Lage Frequency Registration
Sounds with a frequency lower than the human ear can be picked up, are called infrasound and are very difficult to absorb, it is not only a case of buying an expensive microphone, because even the best microphone is designed to record only audible sounds. Although specially built infrasound microphones are available, as made by Bruel & Kjaer, they will put you back around $ 500.
It may be possible to construct your own infrasound monitor using a large membrane or aperture with a diameter of at least 60 cm, or by using a long hollow pipe that can be compressed when the sound touches. You must then attach a sensitive gear gauge to measure the vibrations of both devices. Although this approach could work, it would not give you a recording as such, but you could follow the amplitude of the infrasound waves using an oscilloscope.
Ultra -high frequency recording
On the other side of the human hearing range and then ultrasound is, these are the sounds that the bats use to echo and the waves that are sufficient frequency to penetrate the body into Echanical scanners. Just like low -frequency sounds, high -frequency sounds are also difficult to catch. No standard, ready-made recording device can absorb something that goes much further than the human hearing range.
A bat detector is not a recorder as such, although you could easily adjust it, instead it converts ultrasound into lower frequencies that are in the reach of human hearing. A headphone output on the device can be used to include the converted sounds. However, they can be awkward to use during an investigation.
But the paranormal is the examination of the unknown, it literally means out of reach of normal. So why not go beyond the realm of the normal sound and see if the spirit world can be found there.
