Showing posts with label Class 10 Notes. Show all posts
Showing posts with label Class 10 Notes. Show all posts

Applications of Sound Reflection: Sound Boards, Ear Trumpets, and Megaphones | 10th Science Acoustics

Applications Reflection of Sound

APPLICATIONS REFLECTION OF SOUND

1. Sound board

These are basically curved surfaces (concave), which are used in auditoria and halls to improve the quality of sound. This board is placed such that the speaker is at the focus of the concave surface. The sound of the speaker is reflected towards the audience thus improving the quality of sound heard by the audience.

2. Ear trumpet

Ear trumpet is a hearing aid, which is useful by people who have difficulty in hearing. In this device, one end is wide and the other end is narrow. The sound from the sources fall into the wide end and are reflected by its walls into the narrow part of the device. This helps in concentrating the sound and the sound enters the ear drum with more intensity. This enables a person to hear the sound better.

3. Mega phone

A megaphone is a horn-shaped device used to address a small gathering of people. Its one end is wide and the other end is narrow. When a person speaks at the narrow end, the sound of his speech is concentrated by the multiple reflections from the walls of the tube. Thus, his voice can be heard loudly over a long distance.

The Night the Ghost Got In: Questions and Answers | James Grover Thurber

Answer the questions - The Night the Ghost Got In | by James Grover Thurber

A. Answer the following questions in a sentence or two.

  1. 1. Why was the narrator sorry to have paid attention to the footsteps?

    The narrator was sorry because his imagination of considering his Grandfather as a ghost

  2. 2. Why did Herman and the author slam the doors?

    Herman and the author slammed the door because of their fear of the ghost.

  3. 3. What woke up the mother?

    Slamming of the doors by the narrator and his brother woke up their mother.

  4. 4. What do you understand by the mother’s act of throwing the shoe?

    Author’s mother did not want to take risk by getting down. At the same time, she wanted the police to come there. So, she threw the shoe at neighbour’s home to seek help.

  5. 5. Why do you think Mrs. Bodwell wanted to sell the house?

    Mrs. Bodell wanted to sell the house because she was disturbed often.

  6. 6. How did the cops manage to enter the locked house?

    The cops broke the front door. Thus they manged to enter the locked house.

  7. 7. Why were the policeman prevented from entering grandfather's room?

    Grandfather mistook the police as General Meade’s men who were retreating. With that thinking, he harmed them. So, the police were prevented.to enter grandfather’s room.

  8. 8. Who used the zither and how?

    The narrator’s pet Guinea pig used the zither. It used to sleep on it.

  9. 9. Mention the things that the grandfather imagined.

    Grandfather imagined that the cops were General Meade’s men. He thought that they were beginning to retreat and even desert

B. Answer the following questions in about 100-150 words.

  • 1. Describe the funny incident that caused the confusion in the house.

    Prose : THE NIGHT THE GHOST GOT IN

    Author : James Grover Thurber

    Theme : Chaos in the house

    Characters : The narrator’s family, Mrs. Bodwell, Joe, Reporter, Herman

    Outline : Narrator - strange sound - thought - burglar or ghost - Mother - seek help -Bodwell - called police- Grandfather misunderstood - General Meade’s men - shot - grand father - walked - for water

    It was about a quarter past one o’ clock in the morning. The narrator was in the bathroom. He heard a strange sound. He was scared. He thought it was a burglar or a ghost. So, he went to his brother, Herman’s room. They came out and looked downstairs. Nothing was there. They heard the footsteps circling the dining-room table like a man running and it started up the stairs towards them. So they rushed to their rooms and slammed the doors. The narrator’s mother was aroused by the sound. They thought that there was a burglar in the house. So she threw her shoe at their neighbour, Mr.Bodwell’s window to seek help. Mr. Bodwell called the police. When the police broke into the door, the narrator’s grandfather mistook them as General Meade’s men who were retreating. So he grabbed the gun from them and shot at the police. The police left the house empty handed finally. Next morning, grandfather told that he came to the dining room for water, the previous night. These are the incidents that caused the confusion in the house.

    ESSAY

    • Introduction
    • A strange sound
    • Call for the police
    • Entry of the police
    • Mystery behind the chaos
    • Conclusion

    Introduction

    James Grover Tburber was an American cartoonist, best known for his cartoons and short stories. This lesson clearly tells that too much of imagination will, mislead the situation. Though the theme is trivial, the story provokes all elements of a horror drama.

    A strange sound

    It was about a quarter past one o’ clock in the morning. The narrator was in the bathroom. He heard a strange sound. He was scared. He thought it was a burglar or a ghost. So, he went to his brother Herman’s room. They came out and looked downstairs. Nothing was there. They heard the footsteps circling the dining-room table like a man running and it started up the stairs towards them. So they rushed to their rooms and slammed the doors.

    Call for the police

    Their mother was aroused by the sound. They thought that there was a burglar in the house. So she threw her shoe at their neighbour Mr.Bodwell’s window to seek help. Mr. Bodwell called the police.

    Entry of the police

    When the police broke open the door, the narrator’s grandfather mistook them as General Meade’s men who were retreating. So he grabbed the gun from them and shot at the police. The police left the house empty handed finally.

    Mystery behind the chaos

    The next morning grandfather told that he had walked in the kitchen to have some water the previous night.

    Conclusion

    It finally becomes clear that the narrator mistook his grandfather walking in the dark for a burglar and then a ghost. Their imagination rewarded them a sleepless night of chaotic activities.

    Moral: What you see can be a lie; what you hear can be a lie;
    what you investigate is real/true

  • 2. Narrate the extensive search operation made by the policemen in the house.

    Prose : THE NIGHT THE GHOST GOT IN

    Author : James Grover Thurber

    Theme : Supernatural

    Characters : Mr. Bodwell, Mrs. Bodwell, Joe, Reporter, Herman

    Prose outline : police broke - opened - main door- search - operation - ruined - spilled - objects - drawers- furniture- ransacked - tom - suitcase- zither - Guinea pig - sleep-Chaos -grandfather misunderstood - deserters of general Meade’s army- grab -shot - Pitty - old man- great disappointment- cops - empty handed

    The narrator and his family heard a strange sound at his home. They thought that there was a burglar in the house. They called for the police with the help of their neighbour. The police broke open the main door. During the search, the police ruined the whole house. They spilled all the things from the drawers, the windows were shut up and pulled down, furniture fell with dull thumps. The floor was ransacked and clothes were tom. While pulling a suitcase, they found a zither. Five or six policemen sprang for the attic door, where the narrator’s grandfather was sleeping. Chaos came when Grandfather mistook the police as General Meade’s men who were retreating. He managed to grab a gun from the police and shot at them. It led to crack the rafters. Smoke filled the attic. They all finally got downstairs and locked the door against the grandfather. It was a pity that the police could not get the gun from the old man. With great disappointment, the cops left the home empty handed.

    ESSAY

    • Introduction
    • Search of the police
    • Chaos in the attic
    • Disappointed policemen
    • Conclusion
  • Glossary for His First Flight by Liam O'Flaherty | 10th English Prose

    Glossary - His First Flight | Prose by Liam O'Flaherty

    Glossary

    ledge
    (n)- a narrow shelf that juts out from a vertical surface
    shrilly
    (adv.)- producing a high-pitched and piercing voice or sound
    herring
    (n)- a long silver fish that swims in large groups in the sea
    devour
    (v)- to eat something eagerly and in large amounts, so that nothing is left
    cackle
    (n)- a sharp, broken noise or cry of a hen, goose or seagull
    mackerel
    (n)- a sea fish with a strong taste, often used as food
    gnaw
    (v)- to bite or chew something repeatedly
    trot
    (v)- to run at a moderate pace with short steps
    precipice
    (n)- a very steep side of a cliff or a mountain
    whet
    (v)- to sharpen
    preening
    (v)- cleaning feathers with beak
    plaintively
    (adv.)- sadly, calling in a sad way
    swoop
    (v)- to move very quickly and easily through the air
    beckoning
    (v) - making a gesture with the hand or head to encourage someone to approach or follow.

    Tags : His First Flight | Prose by Liam O'Flaherty , 10th English: UNIT 1 : Prose: His First Flight

    Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail

    10th English: UNIT 1 : Prose: His First Flight : Glossary | His First Flight | Prose by Liam O'Flaherty