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.
There is a lot to like about The Nourishing Traditions Book of Baby and Child Care by Sally Fallon Morrell and Thomas S Cowan. Some of it is exceptionally well-researched (other things I thought were a little sketchy or questionable, see further below). I could never list all the awesome things the book discusses, but some of the highlights for me include:
OAEs are considered to be related to the amplification function of the cochlea. In the absence of external stimulation, the activity of the cochlear amplifier increases, leading to the production of sound. Several lines of evidence suggest that, in mammals, outer hair cells are the elements that enhance cochlear sensitivity and frequency selectivity and hence act as the energy sources for amplification. One theory is that they act to increase the discriminability of signal variations in continuous noise by lowering the masking effect of its cochlear amplification.
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All personal items must be labeled. All staff are CPR/AED/1st Aid certified and have childcare experience. Children will be released only to those individuals who initially dropped them off. Individuals must be 18 years old to pick up a child from the nursery. You are welcome to bring a small snack, however we do not allow any peanut products of any kind. No snacks are provided by staff. Please no sick children
I offer care in a warm, family home environment with lots of playtime, story time and age appropriate activities. Your child will thrive learning new things with other children. I have been a licensed daycare provider for over 17 years. I am CPR and first aid certified. I accept children from newborn to school age. I provide breakfast lunch and an afternoon snack. I have a large backyard for children to play in when the weather is permitting. I also provide excellent references.