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Date: 2023-07-15
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Date: 2023-11-24
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Date: 2023-06-13
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frequency (n.)
A term derived from the study of the physics of sound, and used in ACOUSTIC PHONETICS, referring to the number of occurrences of a sound wave in a unit of time (usually a second); it is measured in hertz (Hz), a term which has replaced the older ‘cycles per second’. An increase in the frequency of a sound correlates with an auditory sensation of higher PITCH.
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"عادة ليلية" قد تكون المفتاح للوقاية من الخرف
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ممتص الصدمات: طريقة عمله وأهميته وأبرز علامات تلفه
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ندوات وأنشطة قرآنية مختلفة يقيمها المجمَع العلمي في محافظتي النجف وكربلاء
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