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(solid-state physics)



(1) (Metal Oxide Semiconductor) See MOSFET.

(2) (Mean Opinion Score) The quality of a digitized voice line. It is a subjective measurement that is derived entirely by people listening to the calls and scoring the results from 1 to 5. Toll quality audio is generally considered to have a MOS rating of 4 and above.

The MOS is an average of the numbers for a particular codec. Because MOS testing requires carefully prepared and controlled test conditions, the best way to get a MOS test done is to have it outsourced. See codec.

An Objective Model
The E-Model is another rating system that provides an objective measurement of quality based on packet loss, jitter and delay. The E-Model reports results as R-values. Following is an approximate relationship between MOS and E-Model quality ratings.

Subjective Interpretation         MOS  R

 Perfect                           5.0 100

 Excellent - almost all satisfied  4.5  90

 Very good - most are satisfied    4.0  80

 Good - some are dissatisfied      3.6  70

 Fair - many are dissatisfied      3.1  60

 Poor - most are dissatisfied      2.6  50

 Bad - not recommended             1.0   0
References in periodicals archive ?
Functional Status and Well-Being of Patients With Chronic Conditions: Results From the Medical Outcomes Study.
Antecedents of adherence to medical recommendations: Results from the Medical Outcomes Study.
Comparison of the Medical Outcomes Study Short-form 36-item Health Survey in Black Patients and White Patients with Acute Chest Pain.
Variations in Resource Utilization Among Medical Specialties and Systems of Care: Results from Medical Outcomes Study.
It was the first study of PTSD in this population to include clinically significant emotional distress (rated on the Brief Symptom Inventory) and functional impairment (rated on the Medical Outcomes Study SF-36 questionnaire).
Quality of life as assessed using the Medical Outcomes Study short form (SF-36) was slightly but significantly worse in patients who received letrozole.
The Nelson study examined 1,681 elderly patients with chronic conditions from the Medical Outcomes Study (a four-year prospective data collection effort that obtained health services utilization and outcomes data in the mid-1980s for about 20,000 enrollees of HMOs and traditional indemnity plans in selected geographic areas).
Functional Status and Well-Being of Patents with Chronic Conditions: Results from the Medical Outcomes Study.
Statistically significant differences in three individual items in the Short Form-36 of the Medical Outcomes Study (SF-36) - bodily pain, general health and vitality - were observed.
After 12 weeks, the 187 patients who received ropinirole reported significantly greater improvements in symptoms, compared with the 195 placebo patients, in four areas of the Medical Outcomes Study Sleep Scale (reduction in sleep disturbance, reduction in daytime sleepiness, increased sleep adequacy, and increased sleep quantity).
The researchers administered a battery of tests to all study participants, including the Blessed Information Memory and Concentration Test (BIMC), the Prime-MD Depression and Anxiety Scale, and the Medical Outcomes Study (MOS) Sleep Scale.
SIMPONI ARIA shown to provide improvements across all eight measures of physical and emotional well-being reported by patients through the Medical Outcomes Study Short Form-36 questionnaire

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