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Laboratory Test Results for SYB EMF Protection Products

At SYB, we take our product claims very seriously, and we want our customers like you to know that.

Please see the tables, below, for the detailed attenuation values from the tests, presented in decibels (dB) and, in some cases, percentages as well.

A decibel is a unit of measurement, often associated with audio volume, but that is also used to measure EMF attenuation, or shielding. A decibel is a ratio between two values: in this case, the power of the EM radiation before it hits the shield, and after. You may read more about what a decibel is here.

However, precisely because decibels are a relatively obscure and confusing unit of measurement for consumers, when possible we have also posted the percentage of radiation that is attenuated, or shielded. The percentage value is quite simply that: the percentage of the wireless radiation that our products deflected during these tests.

Please note the actual amount of shielding provided by any EMF shielding product depends on the specific frequency of the wireless radiation you are trying to block, which is why we post results for different frequencies. As well, these tests were performed at different laboratories around the world at different times, so the way that the data is presented can vary.

The SYB 5G Phone Shield is made with a very powerful shielding fabric that provides excellent near-field and far-field RF shielding effectiveness of over 70 dB tested over 30MHz to 20GHz– that includes 5G frequencies.

This test was performed on July 30, 2019 per the GB/T 30142-2013 ANSI standard for measuring methods for shielding effectiveness of planar electromagnetic shielding materials. The test was performed with an E8257D PSG Analog Signal Generator and an E4447A PSA Spectrum Analyzer.

The results are reported in decibels (dB). EMF attenuation and shielding tests often report results in decibels. We have a post explaining decibels, but a result of over 71 dB indicates 99.9% shielding effectiveness.

Frequency
(MHz)
Shielding
(%)
Shielding
(dB)
3099.9%71.2
10099.9%72.9
60099.9%74.3
91599.9%76.8
150099.9%77.9
245099.9%77.2
300099.9%77.6
500099.9%77.6
800099.9%76.4
1000099.9%75.2
1200099.9%76.8
1500099.9%75.5
1800099.9%74.6
2000099.9%75.3

The SYB Baby Blanket is made with a very powerful shielding fabric constituted from 82% cotton, interwoven with 18% silver thread, providing shielding effectiveness of between 15 and 35.9 dB tested between 15MHz to 26GHz– this includes 5G frequencies.

This test was performed on April 30, 2020 per the GJB 5792-2006 standard for measuring methods for shielding effectiveness of planar electromagnetic shielding materials. The test was performed with an 8563EC Spectrum Analyzer and ZN1180L and ZN1170E Signal Generators.

The results are reported in decibels (dB). EMF attenuation and shielding tests often report results in decibels. We have a post explaining decibels, but to help we’ve also converted the decibels into a percentage value for shielding effectiveness.

FrequencyShielding Effectiveness (dB)Shielding Effectiveness (%)
15 MHz1596.8377%
30 MHz35.999.9743%
100 MHz35.199.9691%
450 MHz34.699.9653%
950 MHz33.699.9563%
1500 MHz34.499.9637%
3 GHz35.299.9698%
6 GHz27.999.8378%
10 GHz25.699.7246%
18 GHz25.299.698%
26 GHz17.398.1379%

Frequency (MHz)Shielding Effectiveness (dB)Shielding Effectiveness (%)
1067.599.99998
3057.799.99983
1004699.99749
30037.999.98378
100031.999.93543
300024.599.64519

The SYB Bandana is made with a very powerful shielding fabric constituted from 65% silver and 35% silk that provides shielding effectiveness of between 29 and 42 dB tested between 30MHz to 26GHz– this includes 5G frequencies.

This test was performed on April 26, 2020 per the GJB 5792-2006 standard for measuring methods for shielding effectiveness of planar electromagnetic shielding materials. The test was performed with an 8563EC Spectrum Analyzer and a ZN1170E Signal Generator.

The results are reported in decibels (dB). EMF attenuation and shielding tests often report results in decibels. We have a post explaining decibels, but these results indicate over 99% shielding effectiveness at all tested frequencies.

Frequency (MHz)Shielding Effectiveness (%)Shielding Effectiveness (dB)
3099.9945%42.6
10099.9934%41.8
45099.9931%41.6
95099.9913%40.6
150099.9931%41.6
300099.9955%35.8
600099.9737%35.8
1000099.9206%31
1800099.9369%32
2600099.8741%29

The SYB Boxer Briefs are made with a very powerful shielding fabric made from 42% silver, with 53% cotton and 5% nylon, providing shielding effectiveness of between 15 and 35.9 dB tested between 15MHz to 40GHz– this includes 5G frequencies.

This test was performed on April 30, 2020 per the GJB 5792-2006 standard for measuring methods for shielding effectiveness of planar electromagnetic shielding materials. The test was performed with an 8563EC Spectrum Analyzer and ZN1180L and ZN1170E Signal Generators.

The results are reported in decibels (dB). EMF attenuation and shielding tests often report results in decibels. We have a post explaining decibels, but to help we’ve also converted the decibels into a percentage value for shielding effectiveness.

FrequencyShielding Effectiveness (dB)Shielding Effectiveness (%)
15 MHz2699.7488%
30 MHz51.499.9993%
100 MHz43.199.9951%
450 MHz39.199.9877%
950 MHz35.899.9737%
1500 MHz34.999.9676%
3 GHz30.999.9187%
6 GHz27.599.8222%
10 GHz3799.98%
18 GHz3199.9206%
26 GHz3199.9206%
40 GHz28.899.8682%

Frequency
(MHz)
Effectiveness
(dB)
Effectiveness
(%)
800-2795.53
1700-2292.06
1900-2292.06
2100-2392.92
3000-2594.38

View the laboratory report of the SYB H.A.R.D. from the University of Gloucestershire.

The SYB Phone Pouch is made with a very powerful shielding fabric that provides excellent near-field and far-field RF shielding effectiveness of over 70 dB tested over 30MHz to 20GHz– that includes 5G frequencies.

This test was performed on July 30, 2019 per the GB/T 30142-2013 ANSI standard for measuring methods for shielding effectiveness of planar electromagnetic shielding materials. The test was performed with an E8257D PSG Analog Signal Generator and an E4447A PSA Spectrum Analyzer.

The results are reported in decibels (dB). EMF attenuation and shielding tests often report results in decibels. We have a post explaining decibels, but a result of over 71 dB indicates 99.9% shielding effectiveness.

Frequency
(MHz)
Shielding
(%)
Shielding
(dB)
3099.9%71.2
10099.9%72.9
60099.9%74.3
91599.9%76.8
150099.9%77.9
245099.9%77.2
300099.9%77.6
500099.9%77.6
800099.9%76.4
1000099.9%75.2
1200099.9%76.8
1500099.9%75.5
1800099.9%74.6
2000099.9%75.3

Frequency (MHz)Effectiveness (dB)Effectiveness (%)
800-4199.10
1700-4699.50
1900-2996.45
2100-3498.00
3000-1887.40