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2. Medical applications of radio frequency - Wikipedia

   en.wikipedia.org/wiki/Medical_applications_of...

   In 1899 Austrian chemist von Zaynek determined the rate of heat production in tissue as a function of frequency and current density, and first proposed using high-frequency currents for deep heating therapy. [7] In 1908 German physician Karl Franz Nagelschmidt coined the term diathermy, and performed the first extensive experiments on patients. [8]

3. Frequency specific microcurrent - Wikipedia

   en.wikipedia.org/wiki/Frequency_specific_micro...

   Frequency Specific Microcurrent (FSM) or frequency Specific Microcurrent Therapy (FSMT) is the practice of introducing a mild electrical current into an area of damaged soft tissue. Practitioners claim that the introduced current enhances the healing process underway in that same tissue.

4. A440 (pitch standard) - Wikipedia

   en.wikipedia.org/wiki/A440_(pitch_standard)

   A440 (also known as Stuttgart pitch [1]) is the musical pitch corresponding to an audio frequency of 440 Hz, which serves as a tuning standard for the musical note of A above middle C, or A 4 in scientific pitch notation.

5. Electromagnetic radiation and health - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_radiation...

   Extremely low frequency EM waves can span from 0 Hz to 3 kHz, though definitions vary across disciplines. The maximum recommended exposure for the general public is 5 kV/m. [20] ELF waves around 50 Hz to 60 Hz are emitted by power generators, transmission lines and distribution lines, power cables, and electric appliances. Typical household ...

6. Therapeutic ultrasound - Wikipedia

   en.wikipedia.org/wiki/Therapeutic_ultrasound

   The ultrasound within tissue consists of very high frequency sound waves, between 800,000 Hz and 20,000,000 Hz, which cannot be heard by humans. Some of the advantages of ultrasound as a diagnostic and therapeutic tool include its safety profile, lack of radiation, portability, and low cost. [ 4 ]

7. If You Keep Seeing 444 Everywhere, The Universe Has A ... - AOL

   www.aol.com/keep-seeing-444-everywhere-universe...

   Not only can 444 give you clarity when it comes to matters of the heart, the synchronicity of the 444 angel number also has an important spiritual significance. “It can be angels, the universe ...

8. Angel number 444: Why seeing this pattern means you're ... - AOL

   www.aol.com/news/angel-number-444-why-seeing...

   Have you found yourself spotting 444, 4:44 or any series of repeating digits? The angel number 444 meaning has to do with change and transformation. Angel number 444: Why seeing this pattern means ...

9. If You See the Number 4 (or 444) Everywhere, Here's What It ...

   www.aol.com/lifestyle/see-number-4-444...

   The angel number 444 signifies guidance. It is a reminder to look inward and think about the people, places, and things moving you forward or holding you back. If You See the Number 4 (or 444 ...