Answered: The ability for mothers to hear their…

The ability for mothers to hear their baby's cry, but not other, louder sounds is best explained by a. signal detection b. difference threshold c. perceptual adaptation d. sensory adaptation 11:02 PM

Health Safety And Nutrition F/Young Child

9th Edition

ISBN:9781305144767

Author:MAROTZ

Publisher:MAROTZ

Chapter3: Assessing Children's Health

Section: Chapter Questions

Problem 4CS

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Concept explainers

Sleep Physiology

Sleep is a condition of reduced muscle movement in the body. Awareness about the surroundings is reduced at the time of sleep. The body stays mildly responsive or non-responsive to external stimuli. The sleep-wake cycle is controlled by the circadian rhythm that produces a resting phase for the body.

Question

The ability for mothers to hear their
baby's cry, but not other, louder
sounds is best explained by
a. signal detection
b. difference threshold
c. perceptual adaptation
d. sensory adaptation
11:02 PM /

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Watch this video (http://openstaxcollege.org/l/2point) to see a quick demonstration of two-point discrimination. Touching a specialized caliper to the surface of the skin will measure the distance between two points that are perceived as distinct stimuli versus a single stimulus. The patient keeps their eyes closed while the examiner switches between using both points of the caliper or just one. The patient then must indicate whether one or two stimuli are in contact with the skin. Why is the distance between the caliper points closer on the fingertips as opposed to the palm of the hand? And what do you think the distance would be on the arm, or the shoulder?
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Occupational Hearing Loss Frequent exposure to loud noise of a particular pitch can cause loss of hair cells in the part of the cochlea that responds to that pitch. People who work with or around noisy machinery are at risk for such frequency-specific hearing loss. Taking precautions such as using ear plugs to reduce sound exposure is important. Noise-induced hearing loss can be prevented, but once it occurs it is irreversible because dead or damaged hair cells are not replaced. FIGURE 33.11 shows the threshold decibel levels at which sounds of different frequencies can be detected by an average 25-year-old carpenter, a 50-year-old carpenter, and a 50-year-old who has not been exposed to on-the-job noise. Sound frequencies are given in hertz (cycles per second). The more cycles per second, the higher the pitch. FIGURE 33.11 Effects of age and occupational noise exposure on hearing. The graph shows the threshold hearing capacities (in decibels) for sounds of different frequencies (given in hertz) in a 25-year-old carpenter (blue), a 50-year-old carpenter (red), and a 50-year-old who did not have any on-the-job noise exposure (brown). How loud did a 1,000-hertz sound have to be for the 50-year-old carpenter to detect it?
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