The Quran advises us to repel evil with that which is better. Prayers deter us from sins. We are directed to recite prayers in soft tones.
Recognising the enemy is critical to understanding the abilities of the enemy and very important to identifying the tools needed to protect and defend with. To understand the dangers posed by the whispers of humans and jinns, we need to know how sound is used and abused by both these creatures, and how it can be used for communication and mind control. Of particular relevance to this study are low-level and infrasound for long distance communication.
[Al-Quran 114]
The heart lies within the breast:
When Moses was commanded to go the Pharaoh, he prayed that his breast be expanded! So, how do whispers affect us?
Whispers
In Q114, we pray for protection from the الْوَسْوَاسِ . From Q7:20 and Q20:120, we learn that this is how Satan communicated with Adam to persuade him to eat from the forbidden tree; and from Q50:16, we learn that our own NAFS is also communicating with us in the same way:
Prevented from Hearing
The devils are prevented from hearing The Quran, while its a shifa and guidance for the believers.
And not (it) suits [for] them and not they are able.
Indeed, they from the hearing (are) surely banished.
So (do) not invoke with Allah, god another lest you be of those punished.
Recognising the enemy is critical to understanding the abilities of the enemy and very important to identifying the tools needed to protect and defend with. To understand the dangers posed by the whispers of humans and jinns, we need to know how sound is used and abused by both these creatures, and how it can be used for communication and mind control.
As discussed in جَانٌّ (Snake || Jinn), jinns are snakes, a kind of reptiles. Humans are mammals. Iblis was from the jinns, thus a snake. He has permission to use his voice and his allies:
قَالَ أَرَأَيْتَكَ هَٰذَا الَّذِي كَرَّمْتَ عَلَيَّ لَئِنْ أَخَّرْتَنِ إِلَىٰ يَوْمِ الْقِيَامَةِ لَأَحْتَنِكَنَّ ذُرِّيَّتَهُ إِلَّا قَلِيلًا
قَالَ اذْهَبْ فَمَن تَبِعَكَ مِنْهُمْ فَإِنَّ جَهَنَّمَ جَزَاؤُكُمْ جَزَاءً مَّوْفُورًا
وَاسْتَفْزِزْ مَنِ اسْتَطَعْتَ مِنْهُم بِصَوْتِكَ وَأَجْلِبْ عَلَيْهِم بِخَيْلِكَ وَرَجِلِكَ وَشَارِكْهُمْ فِي الْأَمْوَالِ وَالْأَوْلَادِ وَعِدْهُمْ وَمَا يَعِدُهُمُ الشَّيْطَانُ إِلَّا غُرُورًا
إِنَّ عِبَادِي لَيْسَ لَكَ عَلَيْهِمْ سُلْطَانٌ وَكَفَىٰ بِرَبِّكَ وَكِيلًا
And when We said to the Angels, "Prostrate to Adam." So they prostrated except Iblis. He said, "Shall I prostrate to (one) whom You created (from) clay?"
He said, "Do You see this whom You have honored, above me? If You give me respite till (the) Day (of) the Resurrection, I will surely destroy his offspring except a few."
He said, "Go, and whoever follows you among them then indeed, Hell (is) your recompense - a recompense ample.
And incite whoever you can among them with your voice, and assault [on] them with your cavalry and infantry and be a partner in the wealth and the children, and promise them." And not promises them the Shaitaan except delusion.
"Indeed, My slaves not for you over them any authority. And sufficient (is) your Lord (as) a Guardian."
وَقُلِ الْحَمْدُ لِلَّهِ الَّذِي لَمْ يَتَّخِذْ وَلَدًا وَلَمْ يَكُن لَّهُ شَرِيكٌ فِي الْمُلْكِ وَلَمْ يَكُن لَّهُ وَلِيٌّ مِّنَ الذُّلِّ وَكَبِّرْهُ تَكْبِيرًا
And say, "All Praise (is) for Allah the One Who has not taken a son and not is for Him a partner in the dominion, and not is for Him any protector out of weakness. And magnify Him (with all) magnificence."
The word تَصْنَعُونَ is also translated in the meanings of to build or construct. The ancient mighty civilisations have built great buildings and monuments. From discoveries being made at those ancient monuments, they also built resonance chambers. Most of them were polytheists, with snakes and serpents playing a significant role in their mythologies. Prophet-King Solomon was a Muslim who was bestowed the last mightiest kingdom not seen since then in this world. His forces included the jinns, i.e. snakes as well. The jinns even built great things in Solomon's kingdom (Q34:12-14). From Q2:102 and Q21:82 we know that the devils (shayateen) were doing other things as well in that kingdom, including teaching magic; however they were being divinely guarded, and therefore could cause only limited harm and only to those for whom Allah permitted such a trial. According to Q7:116, magic can create an optical illusion. Studies in resonance and standing waves show how optical illusions are possible.
Low-level and infrasound are employed by snakes and humans in long distance / remote communication. The following are a few relevant excerpts, and more links at the end of this post.
Snake Communication
https://animals.mom.me/snakes-hear-ears-7892.html
... Snakes ... have inner ear structures complete with cochleas and are able to hear by feeling the vibrations alongside their jaws as they slither on the ground. ...
... Mechanoreceptors are sensory nerves spaced throughout the skin of the body and connected to the spinal cord, enabling a snake to feel vibrations that carry through the sand or soil. These vibrations move through the body and along the spinal nerves to the brain, where they are recognized as sounds. These receptors are extremely sensitive and they react instantly to stimuli, enabling a snake to locate the source of the sound.
... A snake can pick up sound waves through the air, because the skull vibrates when a sound wave hits it. But a snake appears to hear low notes easier than high ones. These impulses move directly from the skull into the snake's inner ears, where the vibrations are sensed by the brain. Some snake owners believe their pets are capable of reacting to the sound of their names.
... Sensitive vibratory reception is common in snakes and enables them to catch prey easily.
The louder and lower frequency airborne sounds are, the more easily a snake can detect them. This isn't entirely unlike our own hearing—although we do hear high-pitched airborne sounds directly more easily than snakes do, we also rely on amplification provided by our ear drums, inner ear hairs, and other parts of our bodies. Studies have shown that snakes can hear sounds in the 80-600 Hz range optimally, with some species hearing sounds up to 1000 Hz (for comparison, the range of human hearing is from 20-20,000 Hz). This means that a snake could hear middle C on a piano, as well as about one octave above and two below, but neither the lowest key (which is 27.5 Hz) nor the highest (which is 4186 Hz). The average human voice is around 250 Hz, which means that snakes can hear us talking as well. Of course, there is likely a lot of variation among snake species, and the hearing of most species has not been examined, so these are generalizations.
https://en.wikipedia.org/wiki/Sonic_weapon
Sonic and ultrasonic weapons (USW) are weapons of various types that use sound to injure, incapacitate, or kill an opponent. Some sonic weapons are currently in limited use or in research and development by military and police forces. Some of these weapons have been described as sonic bullets, sonic grenades, sonic mines, or sonic cannons. Some make a focused beam of sound or ultrasound; some make an area field of sound.
A variety of high powered sonic weapons (SW) exist spanning the infrasonic, ultrasonic, and audible ranges. Because they are weapons which direct sound onto a target, and sound is energy, they can be considered directed-energy weapons.
These weapons produce both psychological and physical effects. ...
Infrasonic generators can cause negative emotions such as fear, anxiety, or depression, as well as biological symptoms like nausea, vomiting, organ damage, burns, or death—depending on the frequency and power level. ...
Within the ELF region of the spectrum, there is a type of sound called infrasound, which occurs between 3 and 20 Hz. Infrasound is usually not heard, but it can be if the power level is sufficient. Next, audible noise begins for most people from about 20 Hz up to 20 kHz, and occurs between the upper ELF into the VLF ranges. Ultrasound begins in the VLF range at about 20 kHz, just above human hearing.
Infrasound
https://en.wikipedia.org/wiki/Infrasound
Infrasound, sometimes referred to as low-frequency sound, is sound that is lower in frequency than 20 Hz or cycles per second, the "normal" limit of human hearing. Hearing becomes gradually less sensitive as frequency decreases, so for humans to perceive infrasound, the sound pressure must be sufficiently high. The ear is the primary organ for sensing infrasound, but at higher intensities it is possible to feel infrasound vibrations in various parts of the body.The study of such sound waves is sometimes referred to as infrasonics, covering sounds beneath 20 Hz down to 0.1 Hz and rarely to 0.001 Hz. People use this frequency range for monitoring earthquakes, charting rock and petroleum formations below the earth, and also in ballistocardiography and seismocardiography to study the mechanics of the heart.
Infrasound is characterized by an ability to cover long distances and get around obstacles with little dissipation. ...
http://signsandscience.blogspot.com/2018/06/prayer-remembrance-of-god.html
https://islam-qna.blogspot.com/2016/01/signs-science-creature-from-earth.html
http://signsandscience.blogspot.com/2018/08/jinn-human-hybrids.html
جَانٌّ (Snake || Jinn)
https://www.ancient-origins.net/myths-legends/tracing-origins-serpent-cult-002393
https://mythology.net/others/concepts/serpent/
https://en.wikipedia.org/wiki/Quetzalcoatl
https://en.wikipedia.org/wiki/Chichen_Itza
https://watchers.news/2014/03/01/the-hummingbird-pyramid-discovered-in-la-man-ecuador-among-17-ancient-temples/
https://www.washingtonpost.com/national/health-science/how-snakes-hear-without-ears/2011/12/29/gIQAuseoWP_story.html?utm_term=.23a8b11df491
https://en.wikipedia.org/wiki/Infrasound
https://en.wikipedia.org/wiki/Sound_energy
https://en.wikipedia.org/wiki/Resonance
https://en.wikipedia.org/wiki/The_Hum
https://en.wikipedia.org/wiki/Standing_wave
https://en.wikipedia.org/wiki/Optical_illusion
https://en.wikipedia.org/wiki/Short-time_Fourier_transform
http://www.noiseandhealth.org/article.asp?issn=1463-1741;year=2004;volume=6;issue=23;spage=29;epage=35;aulast=Findeis
http://www.sciencemag.org/news/2014/09/sounds-you-cant-hear-can-still-hurt-your-ears
https://www.ncbi.nlm.nih.gov/pubmed/16201210
https://mysteriousuniverse.org/2018/03/mind-control-through-the-airwaves/
http://www.human-resonance.org/pyramid.html