Spontaneous otoacoustic emissions (SOAE)s are sounds that are emitted from the ear without external stimulation and are measurable with sensitive microphones in the external ear canal. At least one SOAE can be detected in approx. 35-50% of the population. The sounds are frequency-stable between 500 Hz and 4500 Hz to have unstable volumes between -30 dB SPL and +10 dB SPL. The majority of the people are unaware of their SOAEs; portions of 1-9% however perceive a SOAE as an annoying tinnitus.
The Nourishing Traditions Book of Baby & Child Care makes the principles of traditional nutrition available to modern parents. The book provides holistic advice for pregnancy and newborn interventions, vaccinations, breastfeeding and child development, as well as a compendium of natural treatments for childhood illnesses, from autism to whooping cough. The work of Rudulf Steiner supports the book's emphasis on the child's spiritual requirement for imaginative play.
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