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עמוד:103
103 4 5 أ . ﻧَﺨْﺘﺎرُ ٱﻟْﻤُﺴْﺘَﻮى ٱﻟْﻤُ ﻼﺋِﻢَ ﻟِﻸَْﺻْﻮاتِ ٱﻟﺼّﺎدِرَةِ ﻋَﻦْ ﻛُﻞﱟ ﻣِﻤّﺎ ﻳَﻠﻲ . ب . ﻋَﻠﻰ ﻣﺎذا ٱﻋْﺘَﻤَﺪْﻧﺎ ﻓﻲ ﺗَﺤْﺪﻳﺪِ ﻣُﺴْﺘَﻮى ٱﻟﺼﱠ ﻮْتِ؟ ﻟِﻤﺎذا وَرَدَتِ ٱﻟْﺠُﻤْﻠَﺔُ : "ﻋِﻨْﺪَﻣﺎ ﻳَﺴْﻤَﻊُ أَﺣَﺪُﻛُﻢْﻣﻮﺳﻴﻘﻰ ﺻﺎﺧِﺒَﺔً ﻓَﻬُﻮَ ﻳَﺘَﻤَﺘﱠﻊُ ﺑِﺴَﻤﺎﻋِﻬﺎ، وَﻟٰﻜِﻨﱠﻪُﻓﻲ ٱﻟْﻮَﻗْﺖِ ﻧَﻔْﺴِﻪِ ﻳُﺰْﻋِﺞُ أَﻫْﻠَﻪُ . " ) اَﻟْﻔِﻘْﺮَةُ ٱﻟﺴّﺎدِﺳَﺔُ ( ؟ أ . ﻛَﻲْ ﺗُﺒَﻴ ﱢﻦَ ٱﻟْﻤﻮﺳﻴﻘﻰ ٱﻟﱠﺘﻲ ﻻ ﻳُﻔَﻀﱢ ﻠُﻬﺎ ٱﻷَْﻫْﻞُ . ب . ﻛَﻲْ ﺗُﺤَﺪﱢ دَ ٱﻟْﻤﻮﺳﻴﻘﻰ ٱﻟﱠﺘﻲ ﻧَﺴْﻤَﻌُﻬﺎ ﻓﻲ ﺑُ ﻴﻮﺗِﻨﺎ . ج . ﻛَﻲْ ﺗُﻌَﺮ ﱢﻓَﻨﺎ ٱﻵْراءَ ٱﻟْﻤُﺨْﺘَﻠِﻔَﺔَ ﺣَﻮْلَ ٱﻟْﻤﻮﺳﻴﻘﻰ ٱﻟﺼّﺎﺧِﺒَﺔِ . د . ﻛَﻲْ ﺗُﻌَﺮ ﱢﻓَﻨﺎ ٱﻷَْﻧْ ﻮاعَ ٱﻟْﻤُﺨْﺘَﻠِﻔَﺔَ ﻟِﻠْﻤﻮﺳﻴﻘﻰ ٱﻟﺼّﺎﺧِﺒَﺔِ . ﻣُﺴْﺘَﻮى ٱﻟﺼﱠ ﻮْتِ ﻣَﺼْﺪَرُ ٱﻟﺼﱠ ﻮْتِﻣِﻘْﺪارُ ٱﻟﺼﱠ ﻮْتِ ) dB ( ) ﻣُﻨْﺨَﻔِﺾٌ / ﻣُﺮْﺗَﻔِﻊٌ / ﻣُﺮْﺗَﻔِﻊٌ ﺟِﺪٍّا ( ﻣُﻨَﺒ ﱢﻪٌ 30 ﺣَﺪﻳﺚٌ ﻫﺎدِئٌ 60 ﻣُﻮَﻟﱢﺪُ ﻛَﻬْﺮَﺑﺎءٍ 78 ﻣِﻀَﺨﱠ ﺔُ ﻣِﻴﺎهٍ 79 ﺣَﻔْﻞٌ 130 ﺻَﻔّﺎرَةُ إِﻧْﺬارٍ 140 إِﻗْ ﻼعُ ﻃﺎﺋِﺮَةٍ ﻧَﻔّﺎﺛَﺔٍ 160 إِﻃْ ﻼقُ ﺻﺎروخٍ 180 ) ﻣُﻨْﺨَﻔِﺾٌ / ﻣُﺮْﺗَﻔِﻊٌ / ﻣُﺮْﺗَﻔِﻊٌ ﺟِﺪٍّا ( ) ﻣُﻨْﺨَﻔِﺾٌ / ﻣُﺮْﺗَﻔِﻊٌ / ﻣُﺮْﺗَﻔِﻊٌ ﺟِﺪٍّا ( ) ﻣُﻨْﺨَﻔِﺾٌ / ﻣُﺮْﺗَﻔِﻊٌ / ﻣُﺮْﺗَﻔِﻊٌ ﺟِﺪٍّا ( ) ﻣُﻨْﺨَﻔِﺾٌ / ﻣُﺮْﺗَﻔِﻊٌ / ﻣُﺮْﺗَﻔِﻊٌ ﺟِﺪٍّا ( ) ﻣُﻨْﺨَﻔِﺾٌ / ﻣُﺮْﺗَﻔِﻊٌ / ﻣُﺮْﺗَﻔِﻊٌ ﺟِﺪٍّا ( ) ﻣُﻨْﺨَﻔِﺾٌ / ﻣُﺮْﺗَﻔِﻊٌ / ﻣُﺮْﺗَﻔِﻊٌ ﺟِﺪٍّا ( ) ﻣُﻨْﺨَﻔِﺾٌ / ﻣُﺮْﺗَﻔِﻊٌ / ﻣُﺮْﺗَﻔِﻊٌ ﺟِﺪٍّا ( ) ﻣُﻨْﺨَﻔِﺾٌ / ﻣُﺮْﺗَﻔِﻊٌ / ﻣُﺮْﺗَﻔِﻊٌ ﺟِﺪٍّا (
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