books من الذي اخترع آلة التسجيل
If you do not find what you're looking for, you can use more accurate words.
# Who invented the magnetic tape recorder?
# Who invented the time recorder?
# tape recorder holder
# When was the recording on wax invented?
# When was the camera invented?
# When was the cinema machine invented?
# Who invented the camera?
# Who invented the first calculator
# Who invented the card machine?
# When was the card machine invented?
# Who invented recording on wax?
# When was call recording invented?
# Who invented the telephone without a tape?
# When was the calculator invented?
# When was the hoisting machine invented?
# When was the printer invented?
# When was the moving machine invented?
# Who invented the calculator
# Who invented the steam engine?
# Who invented the percussion instrument?
View more
من الذي اخترع آلة التسجيل (Info)
السباق الي اختراع آلة التسجيل هو الدانماركي فالديمار بولسن عام 1899 .
- يسمي عدد الأمواج الصوتية في الثانية الواحدة : تواتر الأمواج الصوتية . بقدر ما يعلو هذا التواتر بقدر ما يعلو الصوت .
- تتموج طبلة الأذن بنفس سرعة الأمواج الصوتية . تعبر التموجات قناة تدعي " قوقعة الأذن " ومنها تنطلق نحو الدماغ .
