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Amazon.com: TestHelper SW-526A Sound Level Meter Tester 30-130db 18in Large Screen LCD Display Wall Hanging Type Decibel Noise Measuring with Alarm (Enlarged Sound Level Meter) : Industrial & Scientific
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The Use of Sound Level Meter Apps in the Clinical Setting | American Journal of Speech-Language Pathology
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Amazon.com: TestHelper SW-526A Sound Level Meter Tester 30-130db 18in Large Screen LCD Display Wall Hanging Type Decibel Noise Measuring with Alarm (Enlarged Sound Level Meter) : Industrial & Scientific
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