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sound pollution details
শব্দ দূষণ বিবরণ
Última atualização: 2018-04-12
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sound pollution
শব্দ দূষণ
Última atualização: 2017-02-15
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soil pollution details
bengali
Última atualização: 2019-02-08
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sound pollution bengali
শব্দ দূষণ বাংলা
Última atualização: 2018-10-07
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soil pollution details download
মাটি দূষণ বিবরণ ডাউনলোড
Última atualização: 2018-03-20
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soil pollution details in begali
বাগানে মৃত্তিকা দূষণের বিবরণ
Última atualização: 2018-02-17
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essay on sound pollution bengoli
শব্দদূষণ বেঙ্গোলির প্রবন্ধ
Última atualização: 2020-07-10
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essay on sound pollution what is this
শব্দ দূষণ এই কি প্রবন্ধ
Última atualização: 2022-06-22
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sound-pollution projectsound pollution project
শব্দ দূষণ প্রকল্প শব্দ দূষণ প্রকল্প
Última atualização: 2017-10-17
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sound pollution is one of the most talked of topics. it is a great problem for our environment. according to the u.n the normal tolerance limit of sound is 45 decibels. when the vibration of sound is at a pleasant level, it is simply called sound. but when it is sharp and harsh to the ears, it becomes noise. serious harm can be caused to people if they are regularly exposed to sounds exceeding 70 decibels. there are many causes for sound pollution. the vehicles, the loud speakers, mills and fact
শব্দদূষণ অন্যতম আলোচিত বিষয়। এটি আমাদের পরিবেশের জন্য একটি দুর্দান্ত সমস্যা। ইউএন অনুসারে শব্দটির স্বাভাবিক সহনশীলতা সীমা 45 ডেসিবেল। শব্দের কম্পন যখন মনোরম পর্যায়ে থাকে তখন এটিকে কেবল শব্দ বলা হয়। কিন্তু এটি কানের কাছে তীক্ষ্ণ এবং রূ is় হয়ে উঠলে তা শব্দ হয়। লোকেরা যদি নিয়মিতভাবে 70 ডেসিবেল এর বেশি শব্দগুলির সংস্পর্শে আসে তবে গুরুতর ক্ষতি হতে পারে। শব্দ দূষণের অনেক কারণ রয়েছে। যানবাহন, লাউড স্পিকার, কল এবং ঘটনা
Última atualização: 2020-07-27
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