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Showing results for: kHz

Measurement of Electromagnetic Fields Exposure to Humans from Electric Vehicles and Their Supply Equipment

Research RF Safe Research Library Jan 1, 2026

This study reports measurements of electric field intensity (E) and magnetic flux density (B) from electric vehicles (inside driver/passenger seats during driving) and EV supply equipment (near chargers during charging) up to 400 kHz in and around Chennai. E and B inside EVs and E around EVSEs were reported to be…

Dosimetric Electromagnetic Safety of People With Implants: A Neglected Population?

Research RF Safe Research Library Jan 1, 2025

This dosimetric study evaluated whether existing EM safety guidelines protect individuals with conductive implants by assessing implant-related local field enhancements. Across 10 kHz to 1 GHz, the authors report large increases in psSAR10mg and local electric fields near implants, particularly below 100 MHz. In…

Assessment of Electromagnetic Exposure Levels for Humans from Electric Vehicle DC Charging Stations

Research RF Safe Research Library Jan 1, 2025

This simulation study modeled EMF exposure from an electric vehicle DC charging pile transformer using adult and child human models at several distances and for in-vehicle occupants during charging. Reported peak B-field and E-field values at 0.1 m and modeled internal exposures decreased with distance and remained…

Electromagnetic wireless remote control of mammalian transgene expression

Research RF Safe Research Library Jan 1, 2025

This animal proof-of-concept study describes an engineered nanoparticle–cell interface (EMPOWER) enabling wireless regulation of transgene expression using a 1-kHz magnetic field. Chitosan-coated multiferroic nanoparticles reportedly generate intracellular ROS that activates KEAP1/NRF2 biosensors connected to…

Effects of electromagnetic field emitted by a 90 kHz WPT system on the cognitive functions and neuronal excitation of mice.

Research RF Safe Research Library Jan 1, 2025

This animal study examined whether EMF from a 90 kHz magnetic-coupling resonant wireless power transfer (WPT) system affects mouse cognition and hippocampal neuronal excitability. Mice were exposed for 2, 4, or 8 weeks and assessed with a Novel Object Recognition test and dentate gyrus patch-clamp recordings. The…

Performance Evaluation and Calibration of Electromagnetic Field (EMF) Area Monitors Using a Multi-Wire Transverse Electromagnetic (MWTEM) Transmission Line.

Research RF Safe Research Library Jan 1, 2025

This engineering study evaluates and calibrates an EMF area monitor for the 300 kHz–20 MHz frequency band using a multi-wire transverse electromagnetic (MWTEM) transmission line as a controlled electric-field source. The authors highlight that low-frequency electric-field measurements can be sensitive to boundary…

Low-energy amplitude-modulated radiofrequency electromagnetic fields as a systemic treatment for cancer: Review and proposed mechanisms of action

Research RF Safe Research Library Sep 8, 2022

This review discusses low-energy amplitude-modulated RF EMF (27.12 MHz carrier with low Hz–kHz envelope modulation) delivered systemically via intrabuccal antenna devices as a potential treatment for advanced hepatocellular carcinoma. It reports preclinical inhibition of cancer growth in vitro and in mouse xenograft…

The effect of long-term radiofrequency exposure on cognition in human observational studies: A protocol for a systematic review.

Research RF Safe Research Library Jan 1, 2022

This paper presents a protocol for a systematic review of human observational studies assessing long-term radiofrequency (100 kHz to 300 GHz) EMF exposure and cognitive outcomes. It plans to include cohort and case-control studies with at least 6 months follow-up and validated cognitive measures, and to evaluate…

Electromagnetic Fields Generated by the IteraCoil Device Differentiate Mesenchymal Stem Progenitor Cells Into the Osteogenic Lineage.

Research RF Safe Research Library Jan 1, 2022

This in vitro study exposed human adipose-derived mesenchymal stem progenitor cells to an alternating EMF generated by the IteraCoil device at 0.05 and 1 kHz. The authors report that EMF exposure was associated with osteoblastic differentiation in the absence of exogenous pro-osteogenic supplements, assessed by…

Effects of Radiofrequency Electromagnetic Field (RF-EMF) exposure on male fertility and pregnancy and birth outcomes: Protocols for a systematic review of experimental studies in non-human mammals and in human sperm exposed in vitro.

Research RF Safe Research Library Jan 1, 2021

This paper presents protocols for a systematic review of experimental studies assessing RF-EMF exposure (100 kHz–300 GHz) and outcomes related to male fertility and pregnancy/birth effects. The review will cover three evidence streams: non-human mammal male reproductive outcomes, human sperm exposed in vitro, and in…

A Novel In Vitro Device to Deliver Induced Electromagnetic Fields to Cell and Tissue Cultures.

Research RF Safe Research Library Jan 1, 2020

This paper presents an in vitro, noncontact solenoid-coil device designed to deliver intermediate-frequency induced electromagnetic fields that generate electric fields in cell and tissue cultures. The system aims to improve field characterization and reduce conductive heating compared with electrode-based approaches…

Exposure assessment of radio frequency electromagnetic field levels in hospitals of Samsun Province, Turkey.

Research RF Safe Research Library Jan 1, 2020

This exposure assessment measured RF-EMF levels in 21 state hospitals in Samsun Province, Turkey using short-term, long-term, and band-selective approaches across 100 kHz–3 GHz (total) and 27 MHz–3 GHz (band-selective). The study reports that the ICTA 3 V/m limit was exceeded in at least some hospital measurements,…

Magnetic Nanoparticles with High Specific Absorption Rate at Low Alternating Magnetic Field.

Research RF Safe Research Library Jan 1, 2015

This paper describes synthesis and characterization of magnetic nanoparticles intended for tumor hyperthermia applications. It reports that the particles show relatively high specific absorption rate (22–200 W/g) under a 160 kHz alternating magnetic field at 100–500 Oe, despite low saturation magnetization. The…

The effect of electromagnetic radiation emitted by display screens on cell oxygen metabolism - in vitro studies.

Research RF Safe Research Library Jan 1, 2015

This in vitro study exposed human blood platelet suspensions to 1 kHz electromagnetic fields at 150 or 220 V/m for 30 or 60 minutes. The authors report increased ROS and MDA (at 220 V/m, 30 min) and decreased antioxidant enzyme activities (SOD-1 and catalase), with the largest changes at 220 V/m for 60 minutes. They…

High-frequency hearing loss among mobile phone users.

Research RF Safe Research Library Jan 1, 2014

This prospective single-blinded study assessed hearing above 8 kHz among prolonged mobile phone users using high-frequency audiometry. Because few non-users were available, the study compared each participant’s dominant (phone-used) ear with the non-dominant ear, with the audiologist blinded to dominance. The authors…

The effect of extremely low frequency pulsed electromagnetic field on in vitro fertilization success rate in N MRI mice.

Research RF Safe Research Library Jan 1, 2014

This randomized comparative animal study tested whether extremely low frequency pulsed electromagnetic field exposure affects IVF success in NMRI mice. Mice in the experimental group were exposed to a 1.3 mT pulsed field at 4 kHz for 5 hours during the IVF process. Although the exposed group showed a higher IVF…

Study on effective improvement of mobile phone sound quality in a noise environment for the hearing-impaired.

Research RF Safe Research Library Jan 1, 2013

This study evaluated whether the NAL-NL1 hearing-aid fitting formula is appropriate for hearing-impaired mobile communication, comparing it with a modified fitting formula. Speech materials were low-pass filtered at 8 kHz and presented through a mobile phone for word-recognition testing in quiet and noisy conditions.…

[Recanalization of nasolacrimal duct with radio frequency: preliminary study].

Research RF Safe Research Library Jan 1, 2012

This preliminary clinical series evaluated radiofrequency-assisted recanalization of the nasolacrimal duct in adults with confirmed lower lacrimal system obstruction. The procedure used a monopolar high-frequency device at 450 kHz and 150 W under local anesthesia with sedation. At 90 days postoperatively, 81.25% of…

Application of an induced field sensor for assessment of electromagnetic exposure from compact fluorescent lamps.

Research RF Safe Research Library Jan 1, 2012

This study investigates instrumentation and procedures to assess electromagnetic exposure from compact fluorescent lamps (CFLs) by measuring both incident and induced fields in the 10 kHz–1 MHz range. For some CFLs, incident electric fields exceeded ICNIRP reference levels at close distances, but induced fields were…

In vitro tests reveal sample radiofrequency identification readers inducing clinically significant electromagnetic interference to implantable pacemakers and implantable cardioverter-defibrillators.

Research RF Safe Research Library Jan 1, 2010

This in vitro study tested electromagnetic compatibility between passive RFID readers and 15 pacemakers plus 15 ICDs across 134 kHz, 13.56 MHz, and 915 MHz bands. EMI reactions were common with low-frequency RFID and rare with high-frequency RFID, while no reactions were observed with ultra-high-frequency or…

The effect of GSM-like ELF radiation on the alpha band of the human resting EEG.

Research RF Safe Research Library Jan 1, 2008

This double-blind, counterbalanced cross-over study investigated whether extremely low frequency (DC to at least 40 kHz) fields emitted by GSM handsets affect resting EEG. In 72 healthy volunteers, the authors report a decrease in the alpha band during 20 minutes of ELF exposure in the exposed hemisphere only. They…

[Assessment of radiofrequency electromagnetic fields levels in the Taranto area].

Research RF Safe Research Library Jan 1, 2007

This study reports punctual monitoring of RF electromagnetic fields from radiobase stations in the Taranto area, with measurement campaigns conducted from November 2005 to March 2007. Measurements covered 108 transmitting stations across multiple communication technologies within 100 kHz to 3 GHz. Most monitored…

20 kHz Magnetic Field Emission of Induction Cooking Heaters

Research RF Safe Research Library Jan 1, 2004

This exposure assessment measured 20 kHz magnetic field leakage from induction cooking heaters across four models and compared results with ICNIRP general public limits. The maximum reported magnetic flux density was 16 µT at a specified measurement point using two S-type pans. Field leakage depended on pan size and…

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