The Hum/ Microwave Hearing

Many people have contacted us over recent years describing an experience they are having of hearing what sounds like a diesel or jet engine idling 24/7. In hindsight many of our members link this to the time when they became Electrohypersensitive (EHS). EHS is a new environmental/functional impairment brought about from living in an environment laden with toxic levels of electromagnetic/radiofrequency fields and pulsed microwave radiation (EMF/RF/Wi-Fi).

EHS manifests itself through multiple and diverse symptoms (see the BioInitiative Report at:   

‘Microwave hearing’ is one of the symptoms of EHS linked to EMF/RF/Wi-Fi issuing from masts/antennas, mobile and cordless phones, computers, all Wi-Fi gadgets including baby monitors, wireless utility meters and ‘smart’ home appliances. It can also relate to Extremely Low Frequencies (ELF) e.g. from some electrical transmission and distribution lines (dirty electricity) and/or acoustic resonances running along Powerlines. The effect is referred to as the ‘auditory perception of radio frequency fields’/ ‘microwave hearing’, or on social media as ‘the hum’. If you are a newcomer to the auditory perception of radio frequency fields it is likely that this problem has arisen due to: a mobile phone mast/antenna; a Wi-Fi project using a new frequency e.g. 4G/5G or wireless utility meters having been installed in your area and/or to resonances running along the powerlines or electricity wires (dirty electricity) in or near your home. It could also be related to electrosmog/wireless radiation emissions coming from neighbouring houses/apartments.

Although some people found that it is possible to shield electrosmog within the home using YShield paint or some other solutions (see references below), to date none of our members have been able to block out the ‘hum’. Research studies indicate that what we are hearing is not actually a noise in the sense that it is ‘an interaction of microwave pulses directly with the auditory neurons’. It is an effect created by microwave pulses which, ‘upon absorption by soft tissues in the head’ results in ‘acoustic pressure that travels by bone conduction to the inner ear.’  (see research below). These theories can explain how only one person in a family or group of people is experiencing the ‘noise’/’vibration’/’pulsing effect’ i.e. it is not a noise as such and only some people and animals are affected.

Es-Ireland is not made up of physicists, biologists or medical doctors but are a growing group of people across Ireland (and the world) who are now suffering from the torment of ‘microwave hearing’, as well as other debilitating symptoms of EHS. If you are suffering, we do understand what you are going through. For many, this particular problem has had a devastating effect on their lives, especially potential health issues arising from chronic sleeplessness. It is therefore extremely important to protect the environment in your bedroom, as sleep is necessary to keep your immune system healthy.

What you are going through can be debilitating and is very real. Many ‘microwave hearers’ are told that they probably have tinnitus but they eventually (through experience and observation) recognise that when they remove themselves from the situation the ‘hum’/other symptoms cease. Some have moved house successfully. For others, the unstoppable growth of the use of EMF/RF/Wi-Fi combined with the upsurge in electrical voltage required to power them, sees sufferers having to live out their lives in torment. It is really difficult to find a safe place now and the future appears to offer little hope of change– see the EU Proposal 589. Ref:

Those in authority are aware of this issue as it is contained in the Electromagnetic Field Guidelines (ICNIRP) they use. In these it states that ““microwave hearing” effects have been attributed to a thermoelastic interaction in the auditory cortex of the brain.”  Furthermore, “Repeated or prolonged exposure to microwave auditory effects may be stressful and potentially harmful.”  Ref:   Page 506

EHS has become a very worrying environmental issue and for those of us whose bodies have difficulties surviving the onslaught of EMF/RF/Wi-Fi, a medical service that has no knowledge or training in recognising or dealing with EHS exacerbates the problem. See the Guideline of the Austrian Medical Association for the Diagnosis and treatment of EMF [EHS] related health problems and illness, 2012:

:Auditory Perception of Radio-frequency Electromagnetic Fields by Chung-Kwang Chou and Arthur W. Guy – Journal of Acoustical Society of America, Vol 71 (6): 1321 – 1334, June 1982 (published online 1998).

We would recommend that you discuss this matter with your doctor and ask to be referred to a qualified audiologist who will ascertain whether you have tinnitus or not. Make sure you receive a report with the outcome of your diagnosis. If you do not have tinnitus you are possibly suffering from ‘microwave hearing’. One of the most helpful actions suggested by members is to use a White Noise/Sound machine. These help to block out the ‘hum’ and some members use white noise on a radio or just keep a radio turned on at night.

If you use a mobile phone keep it on ‘airplane mode’ so that it is not continuously searching for the nearest and strongest signal and purchase an airtube headset for conversations. Turn off your mobile phone at night.  If you use a computer at home turn the Wi-Fi and Bluetooth off and use an Ethernet cable (hardwire) instead. Turn off the modem/router at night. Replace your cordless phone with a standard landline. You will find more details about these suggested actions and other very useful information on the sites provided below.

Cellular telephones and effects on the brain: the head as an antenna and braintissue as a radio receiver.

WEINBERGER, Z., RICHTER, ED.  Jerusalem college of Technology, Jerusalem, Isreal PUBMED Med Hypotheses 2002 Dec;59(6):703-5


Headache and other neuropsychological symptoms occur in users of cellular telephones, and controversy exists concerning risks for brain cancer. We hypothesize these effects result from the head serving as an antenna and brain tissue as a radio receiver. The frequencies for transmission andreception by cellular telephones, about 900 MHz for analog and 1800 MHz for digital transmission, have wavelengths of 33-35 and 16-17 cm, respectively. Human heads are oval in shape with a shortaxis about 16 to 17 cm in length. Near the ear there will be a cross-section in the head with an axishalf the wavelength of RF/MW transmissions of 900 MHz and equal to the wavelength of RF/MW transmissions at 1800 MHz. Therefore, the human head can serve as a lossy resonator for the electromagnetic radiation emitted by the cellular telephone, absorbing much of the energy specifically from these wavelengths. Brain cells and tissues demodulate the cell-phone’s audio frequencies from the radio frequency carrier. Low audio frequencies in the ranges of alpha and beta waves affect these waves and thereby influence brain function. These effects state the case for a precautionary policy.

Auditory response to pulsed radiofrequency energy.

Elder, JA, Chou, CK – Motorola Florida Research Laboratories, Ft Lauderdale, FL 33322, USA.

Bioelectromagnetics, 2003;Suppl 6:S162-73


The human auditory response to pulses of radiofrequency (RF) energy, commonly called RF hearing, is a well established phenomenon. RF induced sounds can be characterized as low intensity sounds because, in general, a quiet environment is required for the auditory response. The sound is similar to other common sounds such as a click, buzz, hiss, knock, or chirp. Effective radiofrequencies range from 2.4 to 10000 MHz, but an individual’s ability to hear RF induced sounds is dependent upon high frequency acoustic hearing in the kHz range above about 5 kHz. The site of conversion of RF energy to acoustic energy is within or peripheral to the cochlea, and once the cochlea is stimulated, the detection of RF induced sounds in humans and RF induced auditory responses in animals is similar to acoustic sound detection. The fundamental frequency of RF induced sounds is independent of the frequency of the radiowaves but dependent upon head dimensions. The auditory response has been shown to be dependent upon the energy in a single pulse and not on average power density. The weight of evidence of the results of human, animal, and modeling studies supports the thermoelastic expansion theory as the explanation for the RF hearing phenomenon. RF induced sounds involve the perception via bone conduction of thermally generated sound transients, that is, audible sounds are produced by rapid thermal expansion resulting from a calculated temperature rise of only 5 x 10(-6) degrees C in tissue at the threshold level due to absorption of the energy in the RF pulse. The hearing of RF induced sounds at exposure levels many orders of magnitude greater than the hearing threshold is considered to be a biological effect without an accompanying health effect. This conclusion is supported by a comparison of pressure induced in the body by RF pulses to pressure associated with hazardous acoustic energy and clinical ultrasound procedures.

Human auditory system response to modulated electromagnetic energy

Allan Frey 1962


The intent of this paper is to bring a new phenomenon to the attention of physiologists. Using extremely low average power densities of electromagnetic energy, the perception of sounds was induced in normal and deaf humans. The effect was induced several hundred feet from the antenna the instant the transmitter was turned on, and is a function of carrier frequency and modulation. Attempts were made to match the sounds induced by electromagnetic energy and acoustic energy. The closest match occurred when the acoustic amplifier was driven by the rf transmitter’s modulator.

Peak power density is a critical factor and, with acoustic noise of approximately 80 db, a peak power density of approximately 275 mw/ cm2 is needed to induce the perception at carrier frequencies of 425 mc and 1,310 mc. The average power density can be at least as low as 400 μw/cm2. The evidence for the various possible sites of the electromagnetic energy sensor are discussed and locations peripheral to the cochlea are ruled out.

Microwave ray gun controls crowds with noise (ACTIVE DENIEL TECHNOLOGY)

In NEW SCIENTIST 3RD JULY 2008 by  David Hambling

A US company claims it is ready to build a microwave ray gun able to beam sounds directly into people’s heads. The device – dubbed MEDUSA (Mob Excess Deterrent Using Silent Audio) – exploits the microwave audio effect, in which short microwave pulses rapidly heat tissue, causing a shockwave inside the skull that can be detected by the ears. A series of pulses can be transmitted to produce recognizable sounds. The device is aimed for military or crowd-control applications, but may have other uses. Lev Sadovnik of the Sierra Nevada Corporation in the US is working on the system, having started work on a US navy research contract. The navy’s report states that the effect was shown to be effective. Scarecrow beam? MEDUSA involves a microwave auditory effect “loud” enough to cause discomfort or even incapacitation. Sadovnik says that normal audio safety limits do not apply since the sound does not enter through the eardrums. “The repel effect is a combination of loudness and the irritation factor,” he says. “You can’t block it out.” Sadovnik says the device will work thanks to a new reconfigurable antenna developed by colleague Vladimir Manasson. It steers the beam electronically, making it possible to flip from a broad to a narrow beam, or aim at multiple targets simultaneously.

Sadovnik says the technology could have non-military applications. Birds seem to be highly sensitive to microwave audio, he says, so it might be used to scare away unwanted flocks. Sadovnik has also experimented with transmitting microwave audio to people with outer ear problems that impair their normal hearing.

Some more studies that can be accessed that will help you better understand your situation:

Auditory Perception of Radio-Frequency Electromagnetic Fields by Chung-Kwang Chou and Arthur W. Guy. This can be found on: 

or on  (go into research)

Hearing of microwave pulses by humans and animals: effects, mechanism, and thresholds by Lin, JC, and Wang Z.     Ref: Health Phys. 2007 Jun;92(6):621-8

 Transmission of Microwave Induced Intracranial sound to the Inner Ear is Most Likely through Cranial Aqueducts.’  Ronald Seaman   Ref:…/255435860_

Cause of the Hum

Sandra Chianfoni’s website: 

See her YouTube video Boil the Frog Slowly and Dr. Martin Blank’s video of the same name.

Possible helpful information and solutions for affects of EMF/RF/Wi-Fi may be found on a number of sites e.g.  (an Irish Site), EMFields (UK), YShield (Germany) and the ES-UK site.

Things are changing slowly as a number of EHS cases have reached High Court status in different countries and EHS is becoming legally recognised as an environmental/functional impairment. At a recent conference in Krakow (December 2016), “The International Forum on Protection from Electromagnetic Environmental Pollution – The Right to Information for Citizens”, city councillors agreed on a budget to be allocated for the purchase of modern EMF monitoring equipment to be used by the citizens themselves. A Municipal Centre for Dialogue will also be established where citizens can visit and discuss how they are being affected by electromagnetic radiation. is a member of the European Citizens Initiative and the European Co-ordination of Organizations for a Regulation of Electromagnetic Field (EMF) exposure, which Truly Protects Public Health.