الموجات فوق الصوتية 1/3
نحدث بواسطة منبع S للموجات فوق الصوتية دفعات من هذه الموجات وتنتشر في الهواء بسرعة
يلتقط ميكروفونان و يوجدان على نفس الإستقامة مع المنبع S وتفصل بينهما مسافة d, دفعة من هذه الموجات. نربط الميكروفون بالمدخل لراسم التذبذب والميكروفون بالمدخل
نحصل على الرسم التذبذبي الممثل في وثيقة الشكل جانبه (الحساسية الأفقية لراسم التذبذب )
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)
يعزى انتشار هذه الموجات في الهواء إلى انضغاط وتمدد الطبقات الهوائية في اتجاه: