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Mainz, Germany, March 19 2019: Symbolic picture for start of the 5G frequency auction.https://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/mainz-germany-march-19-2019-symbolic-picture-for-start-of-the-5g-frequency-auction-image241262407.html Rubidium frequency standard (atomic clock), circa 1974 - USA Rubidium frequency standard (atomic clock), circa 1974 - USAhttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/rubidium-frequency-standard-atomic-clock-circa-1974-usa-image215348964.html A sign warning about radio frequency fields A sign warning about radio frequency fieldshttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-a-sign-warning-about-radio-frequency-fields-21384695.html Blue sinusoids with identical amplitude on white background Blue sinusoids with identical amplitude on white backgroundhttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/blue-sinusoids-with-identical-amplitude-on-white-background-image331604693.html Visage Frequency seven 7 inch vinyl single Visage Frequency seven 7 inch vinyl singlehttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/visage-frequency-seven-7-inch-vinyl-single-image338420315.html Radio scanner tuned to an aircraft frequency Radio scanner tuned to an aircraft frequencyhttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-radio-scanner-tuned-to-an-aircraft-frequency-52665181.html high frequency radiations measure measurement device appliance HF-Analyzer electric smog environment electric high frequency radiations measure measurement device appliance HF-Analyzer electric smog environment electrichttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-high-frequency-radiations-measure-measurement-device-appliance-hf-33012244.html Cartoon commenting on the frequency of accidents on overcrowded excursion trains. Illustrated by John Tenniel (1820-1914) an English illustrator, graphic humourist, and political cartoonist. Dated 19th century Cartoon commenting on the frequency of accidents on overcrowded excursion trains. Illustrated by John Tenniel (1820-1914) an English illustrator, graphic humourist, and political cartoonist. Dated 19th centuryhttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/cartoon-commenting-on-the-frequency-of-accidents-on-overcrowded-excursion-trains-illustrated-by-john-tenniel-1820-1914-an-english-illustrator-graphic-humourist-and-political-cartoonist-dated-19th-century-image186367613.html Close up of an electrocardiogram in paper form and a stethoscope. 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Until now, little is known about the hearing of penguins. Separated from the penguin enclosure, a total of four animals have been lured daily to the hearing test for several months. The German-Danish research project will investigate the hearing ability of penguins. (to dpa 'Penguins Train for Science: Fit for H/dpa/Alamy Live News Stralsund, Germany. 05th Feb, 2020. Biologist Helen Rößler rewards a Humboldt penguin after a scientific hearing test in a small sound chamber with a fish. The biologists investigate how well the seabirds can hear and in which frequency ranges and volume levels. Until now, little is known about the hearing of penguins. Separated from the penguin enclosure, a total of four animals have been lured daily to the hearing test for several months. The German-Danish research project will investigate the hearing ability of penguins. (to dpa 'Penguins Train for Science: Fit for H/dpa/Alamy Live Newshttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stralsund-germany-05th-feb-2020-biologist-helen-rler-rewards-a-humboldt-penguin-after-a-scientific-hearing-test-in-a-small-sound-chamber-with-a-fish-the-biologists-investigate-how-well-the-seabirds-can-hear-and-in-which-frequency-ranges-and-volume-levels-until-now-little-is-known-about-the-hearing-of-penguins-separated-from-the-penguin-enclosure-a-total-of-four-animals-have-been-lured-daily-to-the-hearing-test-for-several-months-the-german-danish-research-project-will-investigate-the-hearing-ability-of-penguins-to-dpa-penguins-train-for-science-fit-for-hdpaalamy-live-news-image344704115.html notice radio frequency environment warning sign on a chain link fence notice radio frequency environment warning sign on a chain link fencehttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-notice-radio-frequency-environment-warning-sign-on-a-chain-link-fence-174842628.html The LOw Frequency ARray (LOFAR) radio telescope at the Science and Technology Facilities Council's Chilbolton Observatory, Hampshire. 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Mainz, Germany, March 19 2019: Symbolic picture for start of the 5G frequency auction.https://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/mainz-germany-march-19-2019-symbolic-picture-for-start-of-the-5g-frequency-auction-image241262413.html Low-frequency measurement laboratory from 1938, Museum for Industrial Culture, Aeussere Sulzbacher Strasse 60-62, Nuremberg Low-frequency measurement laboratory from 1938, Museum for Industrial Culture, Aeussere Sulzbacher Strasse 60-62, Nuremberghttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-low-frequency-measurement-laboratory-from-1938-museum-for-industrial-48713580.html Royal Society Summer Science Exhibition, boys learning how to moderate the resonant frequency of buildings during an earthquake tremor, London UK Royal Society Summer Science Exhibition, boys learning how to moderate the resonant frequency of buildings during an earthquake tremor, London UKhttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/royal-society-summer-science-exhibition-boys-learning-how-to-moderate-the-resonant-frequency-of-buildings-during-an-earthquake-tremor-london-uk-image259076565.html RF Security Tag aerial metal coiled induction alarm system for security and theft protection alarm system RF Security Tag aerial metal coiled induction alarm system for security and theft protection alarm systemhttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-rf-security-tag-aerial-metal-coiled-induction-alarm-system-for-security-91125051.html Pictogram heart frequency Pictogram heart frequencyhttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/pictogram-heart-frequency-image335202677.html DENNIS QUAID, FREQUENCY, 2000 DENNIS QUAID, FREQUENCY, 2000https://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/dennis-quaid-frequency-2000-image239406028.html DENNIS QUAID, FREQUENCY, 2000 DENNIS QUAID, FREQUENCY, 2000https://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/dennis-quaid-frequency-2000-image240761690.html Frequency with heart symbol at the end Frequency with heart symbol at the endhttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-frequency-with-heart-symbol-at-the-end-104841792.html US Wildfire Frequency, 1983 to 2015 US Wildfire Frequency, 1983 to 2015https://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/us-wildfire-frequency-1983-to-2015-image352804050.html Audio Music Wave Frequency Concept Audio Music Wave Frequency Concepthttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-audio-music-wave-frequency-concept-126062943.html Fraktal fractal wallpaper black and colorful geometric shapes illustrate space universe magic frequency explosion galaxy or galaxies. 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