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The child listens via headphones to a program of specially filtered and modulated music with wide frequency range. The program is modified for each child with certain frequencies of sound filtered using an electronic device, which randomly switches between low- and high-pass filtering for random durations between 1/4 and 2 seconds.
The Tomatis Method is a type of auditory integration training. [3] It has been classified as a pseudoscience. [4]Due to the lack of scientific basis and the wide range of diseases it claimed to treat, French authorities have always considered Tomatis sound therapy as an alternative medicine which should not be promoted.
This does not mean that frequencies above 100 kHz are audible, but that time discrimination is not directly coupled with frequency range. [7] [8] Frequency resolution of the ear is about 3.6 Hz within the octave of 1000–2000 Hz That is, changes in pitch larger than 3.6 Hz can be perceived in a clinical setting. [6]
Saccular acoustic sensitivity is a measurement of the ear's affectability to sound. The saccule's normal function is to keep the body balanced, but it is believed to have some hearing function for special frequencies and tones.
The wavelength of a sound is the distance between any two consecutive matching points on the waveform. The audible frequency range for young humans is about 20 Hz to 20 kHz. Hearing of higher frequencies decreases with age, limiting to about 16 kHz for adults, and even down to 3 kHz for elders. [citation needed]
One of the first groups known to heal with sound were the aboriginal people of Australia. The modern name of their healing tool is the didgeridoo, but it was originally called the yidaki. 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.
Humans normally hear sound frequencies between approximately 20 Hz and 20,000 Hz (20 kHz), [18]: 382 The upper limit decreases with age. [18]: 249 Sometimes sound refers to only those vibrations with frequencies that are within the hearing range for humans [19] or sometimes it relates to a particular animal. Other species have different ranges ...
Ultrasound is applied using a transducer or applicator that is in direct contact with the patient's skin. Gel is used on all surfaces of the head to reduce friction and assist transmission of the ultrasonic waves. Therapeutic ultrasound in physical therapy is alternating compression and rarefaction of sound waves with a frequency of 0.7 to 3.3 ...
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