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2. Vibroacoustic therapy - Wikipedia

   en.wikipedia.org/wiki/Vibroacoustic_Therapy

   Human mechanoreceptors, such as Pacinian corpuscles, can detect vibrations up to 1,000 Hz, frequencies between 30 Hz and 120 Hz are generally considered to have a calming and relaxing effect, which is why they are often used in therapeutic contexts.40 Hz specifically, has been widely studied in vibroacoustic therapy and other fields due to its ...

3. 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.

4. Georges Lakhovsky - Wikipedia

   en.wikipedia.org/wiki/Georges_Lakhovsky

   If set up correctly, the unit is supposed to create a broad band frequency spectrum of low amplitude, covering a much greater range of frequencies, from 1 Hz to 300 GHz, than those of the exciting generator (usually several 100 kHz to a few MHz from a Tesla transformer or several kilohertz from an induction coil). The power of each individual ...

5. Music therapy - Wikipedia

   en.wikipedia.org/wiki/Music_therapy

   The yidaki produced sounds that are similar to the sound healing techniques used in modern day. The sound of the didgeridoo produces a low, bass frequency. For at least 40,000 years, the healing tool was believed to assist in healing "broken bones, muscle tears and illnesses of every kind". [82]

6. Beat (acoustics) - Wikipedia

   en.wikipedia.org/wiki/Beat_(acoustics)

   For example, if a 530 Hz pure tone is presented to a subject's right ear, while a 520 Hz pure tone is presented to the subject's left ear, the listener will hear beating at a rate of 10 Hz, just as if the two tones were presented monaurally, but the beating will have an element of lateral motion as well.

7. 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 ...

8. Piano key frequencies - Wikipedia

   en.wikipedia.org/wiki/Piano_key_frequencies

   A jump from the lowest semitone to the highest semitone in one octave doubles the frequency (for example, the fifth A is 440 Hz and the sixth A is 880 Hz). The frequency of a pitch is derived by multiplying (ascending) or dividing (descending) the frequency of the previous pitch by the twelfth root of two (approximately 1.059463).

9. AOL Mail

   mail.aol.com/?rp=webmail-std/en-us/basic

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!