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Date: 2023-08-17
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Date: 16-6-2022
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Date: 7-6-2022
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period (n.)
A term derived from the study of the physics of sound, and used in ACOUSTIC PHONETICS, referring to the time it takes for a CYCLE of pressure variation in a sound wave to repeat itself. The shorter the period, the more cycles there will be in a given unit of time, and thus the higher the FREQUENCY. Waveforms which show a repeating pattern of vibration are periodic waves; those which do not are aperiodic. Speech makes use of both types of waveform: VOWEL sounds have periodic waveforms; FRICATIVES, for example, involve aperiodic waveforms.
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كيف تساهم الأطعمة فائقة المعالجة في تفاقم مرض يصيب الأمعاء؟
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مشروع ضخم لإنتاج الهيدروجين الأخضر يواجه تأخيرًا جديدًا
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المجمع العلمي يختتم دورته القرآنية في فن الصوت والنغم بالطريقة المصرية
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