Pitch of Noise

Duration: 3 min

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Inside: a video lesson and guided study material.

Module outline

  1. Child Development and Pedagogy / बाल विकास एवं शिक्षाशास्त्र: Concept of Development / विकास की अवधारणा, Psychological Theories of Development / विकास के मनोवैज्ञानिक सिद्धांत, Individual Differences, Personality and Gender / व्यक्तिगत भिन्नताएँ, व्यक्तित्व एवं जेंडर, Intelligence and Creativity / बुद्धि एवं सृजनात्मकता, Learning and Its Theories / अधिगम एवं इसके सिद्धांत, How Children Think and Learn / बालक कैसे सोचते एवं सीखते हैं, Emotion, Motivation, Mental Health and Guidance / संवेग, अभिप्रेरणा, मानसिक स्वास्थ्य एवं निर्देशन, Inclusive Education / समावेशी शिक्षा, Teaching-Learning Process / शिक्षण-अधिगम प्रक्रिया, Teaching Methods and Strategies / शिक्षण विधियाँ एवं रणनीतियाँ, Assessment and Evaluation / आकलन एवं मूल्यांकन, Lesson Planning and Teaching Skills / पाठ योजना और शिक्षण कौशल, Teaching Resources and Educational Technology / शिक्षण संसाधन और शैक्षिक प्रौद्योगिकी, Classroom Management and Communication / कक्षा प्रबंधन और सम्प्रेषण, Teacher Identity and Professional Development / शिक्षक पहचान और व्यावसायिक विकास, Educational Thinkers, Aims and National Policies / शैक्षिक विचारक, उद्देश्य एवं राष्ट्रीय नीतियाँ, Life Skills, Values, Peace and Environmental Education / जीवन कौशल, मूल्य, शांति एवं पर्यावरण शिक्षा, Social Science Pedagogy / सामाजिक विज्ञान शिक्षणशास्त्र, Social and Political Life / सामाजिक एवं राजनीतिक जीवन, Science Pedagogy / विज्ञान शिक्षण शास्त्र
  2. Language I — हिंदी / Hindi: भाषा, लिपि और वर्ण-विचार, संधि, शब्द-स्रोत और शब्द-रचना, समास, शब्द-भेद: विकारी और अविकारी, लिंग, वचन, कारक, काल और वाच्य, वाक्य-विचार और शुद्ध लेखन, शब्द-भंडार, रस, छंद, अलंकार और शब्द-शक्ति, हिंदी साहित्य, अपठित बोध, हिंदी शिक्षणशास्त्र, ICT in Education / शिक्षा में ICT
  3. Language II — English: Sounds, Spelling and Word Formation, Parts of Speech, Nouns and Pronouns, Articles, Determiners and Adjectives, Verbs and Modals, Tenses and Subject–Verb Agreement, Adverbs, Prepositions and Conjunctions, Sentence Structure, Voice and Narration, Vocabulary, Sentence Correction and Writing Skills, Poetry and English Literature, Reading Comprehension, Pedagogy of English Language
  4. Language II — اردو / Urdu: رسم الخط، املا اور تلفظ, ذخیرۂ الفاظ, قواعد, محاورے اور ضرب الامثال, شعر و سخن, اردو ادب کی تاریخ, تفہیمِ عبارت, اردو کی تدریس
  5. Language II — संस्कृत / Sanskrit: वर्णविचारः एवं संज्ञाप्रकरणम्, सन्धिप्रकरणम्, शब्दरूपाणि, धातुरूपाणि, कारकाणि एवं विभक्तयः, उपसर्गाः एवं अव्ययानि, प्रत्ययप्रकरणम्, समासप्रकरणम्, वाच्यप्रकरणम्, संख्याज्ञानम्, शब्दज्ञानम् एवं अनुवादः, अपठितावबोधनम्, संस्कृतसाहित्यम् एवं काव्यशास्त्रम्, संस्कृतशिक्षणशास्त्रम्
  6. Mathematics / गणित: Number System & Place Value / संख्या पद्धति एवं स्थानीय मान, Basic Operations, Simplification & Patterns / मूलभूत संक्रियाएँ, सरलीकरण एवं पैटर्न, Factors, Divisibility, HCF & LCM / गुणनखंड, विभाज्यता, म.स.प. एवं ल.स.प., Fractions & Decimals / भिन्न एवं दशमलव, Squares, Cubes, Exponents & Surds / वर्ग, घन, घातांक एवं करणी, Measurement: Length, Mass, Capacity, Time & Money / मापन: लंबाई, भार, धारिता, समय एवं मुद्रा, Algebra / बीजगणित, Ratio, Proportion, Average & Ages / अनुपात, समानुपात, औसत एवं आयु, Percentage, Profit–Loss & Interest / प्रतिशत, लाभ-हानि एवं ब्याज, Time & Work and Speed–Distance / समय-कार्य एवं चाल-दूरी, Lines, Angles, Shapes & Coordinates / रेखाएँ, कोण, आकृतियाँ एवं निर्देशांक, Triangles, Quadrilaterals, Circles & Trigonometry / त्रिभुज, चतुर्भुज, वृत्त एवं त्रिकोणमिति, Mensuration: Perimeter, Area & Volume / क्षेत्रमिति: परिमाप, क्षेत्रफल एवं आयतन, Data Handling, Statistics & Probability / आँकड़ा प्रबंधन, सांख्यिकी एवं प्रायिकता, Mathematics Pedagogy / गणित शिक्षणशास्त्र, Mathematical Operations & Arithmetical Reasoning / गणितीय संक्रियाएँ एवं अंकगणितीय तर्क
  7. Environmental Studies / पर्यावरण अध्ययन: Family, Friends and Community / परिवार, मित्र और समुदाय, Plants / पौधे, Animals / जंतु, Farming and Animal Husbandry / खेती और पशुपालन, Food and Nutrition / भोजन और पोषण, Body and Health / शरीर और स्वास्थ्य, Water / जल, Shelter / आवास, Travel, Transport and Communication / यात्रा, परिवहन और संचार, Maps, Directions and India / मानचित्र, दिशाएँ और भारत, Things We Make and Do / हम क्या बनाते और करते हैं, Earth, Sky and Disasters / पृथ्वी, आकाश और आपदाएँ, Environment, Ecology and Wildlife / पर्यावरण, पारिस्थितिकी और वन्यजीव, Natural Resources, Pollution and Climate Change / प्राकृतिक संसाधन, प्रदूषण और जलवायु परिवर्तन, Pedagogy of Environmental Studies / पर्यावरण अध्ययन का शिक्षणशास्त्र, Ancient Indian History / प्राचीन भारत का इतिहास, Earth, Globe and Maps / पृथ्वी, ग्लोब एवं मानचित्र, Physical Geography / भौतिक भूगोल, Natural Vegetation, Wildlife and World Regions / प्राकृतिक वनस्पति, वन्य जीवन एवं विश्व के प्रदेश, Geography of India / भारत का भूगोल, Resources and Development / संसाधन एवं विकास, Indian Constitution / भारतीय संविधान, Government: Union, State and Local / सरकार: केंद्र, राज्य एवं स्थानीय, Force, Pressure, Work and Energy / बल, दाब, कार्य एवं ऊर्जा, Heat and Sound / ऊष्मा एवं ध्वनि, Light / प्रकाश, Universe and Natural Phenomena / ब्रह्मांड एवं प्राकृतिक परिघटनाएँ, Matter and Its Structure / पदार्थ एवं उसकी संरचना, Metals, Non-metals and Materials of Daily Use / धातु, अधातु एवं दैनिक उपयोग की सामग्री, Living World: Classification, Cell and Tissues / सजीव जगत: वर्गीकरण, कोशिका एवं ऊतक, Human Body and Organ Systems / मानव शरीर एवं अंग तंत्र, Food, Nutrition and Health / भोजन, पोषण एवं स्वास्थ्य, Environment and Ecology / पर्यावरण एवं पारिस्थितिकी, Uttar Pradesh GK / उत्तर प्रदेश सामान्य ज्ञान, Plants: Nutrition, Transport and Reproduction / पादपों में पोषण, परिवहन एवं जनन, Sports / खेल जगत, International Relations & Organisations / अंतरराष्ट्रीय संबंध एवं संगठन, Key Appointments & Office Holders / प्रमुख नियुक्तियाँ एवं पदधारक
  8. Extra Practice (beyond syllabus) / अतिरिक्त अभ्यास (पाठ्यक्रम से बाहर): Indian Economy: Data & Current Affairs / भारतीय अर्थव्यवस्था: आँकड़े एवं समसामयिकी, Indian Art & Culture / भारतीय कला एवं संस्कृति, Science & Technology / विज्ञान एवं प्रौद्योगिकी, Environment & Climate Affairs / पर्यावरण एवं जलवायु समसामयिकी, Defence & Security / रक्षा एवं सुरक्षा, Static General Knowledge / स्थिर सामान्य ज्ञान, Government Schemes, Governance & Infrastructure / सरकारी योजनाएँ, शासन एवं आधारभूत संरचना, Ranking, Seating Arrangement & Puzzles / क्रम, बैठक व्यवस्था एवं पहेली, Calendar & Clock / कैलेंडर एवं घड़ी, Dice & Cubes / पासा एवं घन, Medieval Indian History / मध्यकालीन भारत का इतिहास, Colonial India and Social Reform / औपनिवेशिक भारत एवं समाज सुधार, Indian National Movement and Independent India / भारतीय राष्ट्रीय आंदोलन एवं स्वतंत्र भारत, Technology, Measurement and Motion / प्रौद्योगिकी, मापन एवं गति, Chemical Reactions, Acids, Bases and Salts / रासायनिक अभिक्रियाएँ, अम्ल, क्षार एवं लवण, Economics and Indian Economy / अर्थशास्त्र एवं भारतीय अर्थव्यवस्था, Electricity and Magnetism / विद्युत एवं चुंबकत्व, Bihar GK / बिहार सामान्य ज्ञान, Rajasthan GK / राजस्थान सामान्य ज्ञान, Curriculum and School Activities / पाठ्यचर्या और विद्यालयी गतिविधियाँ, Computer Hardware and Peripherals / कंप्यूटर हार्डवेयर एवं परिधीय उपकरण
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The video presents a lecture on the classification of sound waves based on frequency, using a bilingual (English and Hindi) slide. The instructor explains the three main categories: infrasonic (below 20 Hz), normal sound (20 Hz to 20,000 Hz), and ultrasonic (above 20,000 Hz). The slide details the sources of these sounds, such as thunder for infrasonic and electrical generators for ultrasonic, and the organisms that can hear them, like elephants for infrasonic and bats for ultrasonic. The lower part of the slide visually compares the wavelengths of these sound types and illustrates the hearing ranges of different species, including animals, humans, and birds, using wave diagrams and silhouettes. The instructor uses a pen to point to specific sections of the table and diagram to emphasize key points throughout the lesson.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a full view of a presentation slide titled 'Pitch (Hz)' which is divided into a table and a diagram. The table lists three sound ranges: Infrasonic (0-20 Hz), Normal sound (20 Hz - 20,000 Hz), and Ultrasonic (More than 20,000 Hz), along with their production sources and the organisms that can hear them. The instructor, a woman in an orange shirt, begins by explaining the concept of pitch and frequency. She points to the 'Infrasonic range' section, which is produced by thunder, earthquakes, and volcanoes, and is heard by elephants and whales. She then moves to the 'Normal sound range', which is produced by day-to-day activities and is heard by humans. The diagram below the table visually represents the different sound waves, showing that infrasonic waves have the longest wavelength, normal sound waves are intermediate, and ultrasonic waves have the shortest wavelength. The instructor uses a pen to highlight the 'Infrasonic' and 'Normal sound' sections of the table.

  2. 2:00 – 2:53 02:00-02:53

    The instructor continues her explanation, now focusing on the 'Ultrasonic Range'. She points to the table entry for 'Ultrasonic Range', which is produced by an 'Electrical signal generator (ultrasound scans)' and is heard by bats and dolphins. She then moves to the diagram at the bottom of the slide, which illustrates the hearing ranges of different species. She points to the 'Animal Hearing' section, which includes an elephant, and the 'Human Hearing' section, which shows a family silhouette. She then points to the 'Bird Hearing' section, which features a bat, and explains that birds use ultrasonic waves for navigation and hunting. The instructor uses the pen to circle the 'Ultrasonic Range' and the 'Bird Hearing' section, emphasizing the connection between the high-frequency sound and the animal's ability to hear it. She also points to the 'Power' and 'Diagnostic' labels under the ultrasonic wave diagram, indicating its applications in medical imaging.

The lecture systematically explains the classification of sound waves by frequency, using a structured table and a comparative diagram. The instructor progresses from the lowest frequency (infrasonic) to the highest (ultrasonic), clearly defining each range, its sources, and the biological or technological systems that can perceive it. The visual aids, including the wave diagrams and animal silhouettes, effectively illustrate the relationship between frequency, wavelength, and hearing ability, reinforcing the core concept that different species have evolved to detect specific sound frequencies for survival and communication.

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