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Global Standards Collaboration
GSC#10
28 August – 2 September 2005
Sophia Antipolis, France
Agenda Item: 5.2
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ARIB Activities
on EMC and Human Health Effects
ARIB, Japan
2005
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Basic Activities
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1. Promotion of researches concerning the
impact of RF exposure on human health
2. Public Information concerning EMC and
electromagnetic environment
3. Development and maintenance of ARIB
standards and technical papers
4. Contribution to the domestic and
international standards
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Purposes of Research
 To obtain scientific data to answer
public unease toward human exposure
to RF-EMF, from the industrial
standpoint
 To contribute to the government initiated
research programs
 To develop a consistent recognition
among ARIB members for the relevant
subject
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GSC
Researches in 2004 fiscal year
 3 studies to confirm the safety of
cellular phone RF exposure
1. EMF estimation study in semi-echoic environments:
(NICT, Hokkaido University and ARIB members)
2. Replication study of the in-vivo experiment on BBB
(Blood Brain Barrier) damage due to RF exposure:
(National Institute of Public Health, Dept. of Pathology,
Tokyo Medical University, and Nagoya Institute of Technology )
3. Volunteer study for brain activity effects caused by digital
cellular phone use:
(University of Tokyo)
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A study on implantable cardiac GSC
pacemaker EMI from cellular radios
in semi-echoic environments
(e.g. train carriage and elevator)
There is a concern that the simultaneous use of several
cellular phones in a train carriage might cause unexpectedly
high exposure levels due to the reflection and accumulation
of RF waves inside the carriage (semi-echoic environment).
We have conducted both precise numerical simulations and
experiments to examine this concern in an actual
environment. Cardiac pacemaker EMI is the most important
issue to investigate from the standpoint of responsibility to
the public.
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A possibility of accumulated EMF excitation
in semi-echoic environment
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Ceiling
330
Histogram (f=800MHz)
600
14 cellular radios, 120 passengers
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antenna
y =0
1,270
Floor
10
Ratio (%)
8
y=0
6
4
standing : 84
(height)
150cm : 24
160cm : 36
170cm : 15
180cm : 9
y=600mm
y = -600mm
2
0
-70
sitting : 36
-60
-50
-40
Electric field intensity (dB)
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Conclusions
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Public areas have very low Q factors and so high spot
levels of EMF are not seen due to the considerable
absorption by the humans inside these areas.
Pacemaker malfunction due to cellular radio EMF will
not occur at all in a train carriage even if several cellular
radios are transmitting RF power at the maximum level
simultaneously except for the vicinity of the radios.
Radios can be safely used, provided the separation
guideline of 22cm is kept.
Farther investigations on the elevators are required
(ongoing).
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Replication study to Salford’s research on
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brain damage induced by 915 MHz
electromagnetic field using a TEM-cell
exposure system
Although many studies have been conducted, the scientific
discussion still remains to judge the BBB damage. Therefore the
replication study is required to reach conclusion.
•
•
•
•
•
•
•
•
•
•
•
1979
1982
1982
1994
1997
1998
2001
2003
2003
2002~3
2005
Preston
Gruenau
Ward
Salford
Fritze
Tsurita, Nagawa
Aubineau
Salford
Masuda
Shirai (ARIB)
Ohkubo(ARIB)
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2.45GHz
2.8GHz
2.45GHz
915MHz
900MHz
1.5GHz
900MHz
915MHz
1.5GHz
1.5GHz
915MHz
Negative
Negative
Negative
Positive
Positive
Negative
Negative
Positive
Negative
Negative
Negative
Prof. Salford claims
that the use of cellular
phone by children
should be avoided
because of the
possibility of the BBB
damage due to EMF
irradiation.
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Objectives and method
1 To confirm whether or not the same positive
effects as Salford’s group reported occur.
2 If negative, then to make the artifacts of
Salford’s experiments clear.
 The same exposure system and experimental
protocol were adopted as Salford did.
 Endpoints: BBB disraption and neural
degeneration
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Exposure system and dosimetry
estimation
A computational (FDTD)
result for SAR
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Conclusion
There
were
no
positive
effects
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observed
regarding BBB (Blood-Brain Barrier) and Neuron
disruptions in Rat Brain.
The artifacts of the experiments which reported
positive effects were revealed by the pathologist
analysis.
The obtained results of this study will be
submitted to the peer reviewed journal soon.
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Volunteer study on brain activity effects
caused by digital cellular phone use
(University of Tokyo)
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Public Information
 Internet Web-pages
 Leaflets and booklets;
Published a scientific book on the
safety of RF-EMF for the general public
(distributed junior high schools and
bookshops)
 Seminars;
for the public, several times a year
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ARIB Standard and Technical Report
Related to Human Exposure
ARIB STD-T56 v.2 /1998 “Specific Absorption Rate
(SAR) Estimation for Cellular Phone ” established in
January, 2002 is under revision to harmonize with the
relevant IEC standard of Pt. 62209 finalized in
February, 2005.
This will give the technical supports to the Japanese
SAR regulation that has been put into practice since
June 2002.
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Future schedule
 Continuous promotion of research on health
issues of public concern:
Regarding, (a) EMF estimations in semi-echoic
environments, (b) volunteer study for RFEMF effect on regional cerebral blood flow
 Reinforcement of public information on
website, and publication of leaflets for the
general public
 Maintenance of ARIB standards and
technical papers
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