Sounds

22 April 2020

Kids in a choir
Kids in a choir 
Have you ever been to a concert or a choir? In a concert, you will hear the musical instruments played loudly and the singer sings resoundingly. However, how did the music travel from the stage to you? What did the performers do to make loud and soft sounds, high-pitched and low-pitched sounds using their instruments or their own voice? To answer this, we must first know what is sound.

Sounds are made when things or air vibrate. In other words, vibration is something that produces sound. 
Flicking a ruler
Flicking a ruler
When you flick a ruler on the table, you will observe the ruler vibrating. Once the vibration stops, the sound will also disappear. The harder you flick the ruler, the louder the sound. When you place a longer ruler over the edge of the table, the sound will be lower in pitched (low in frequency wave). This is because the vibration becomes slower, decreasing the pitch of the sound. So, what if you put a shorter ruler over the edge of the table? Well, you know the answer, it's high-pitched sound (high in frequency wave). Therefore, slow vibration produces low-pitched sounds while fast vibration produces high-pitched sounds. 

So, can we make sound using different things and materials? If your answer is YES, then you’re certainly correct. There are some ways to make things vibrate and produce sounds such as plucking, hitting, blowing and shaking. These ways are used particularly when you play musical instruments like guitar, drum, recorder and angklung. 

Accordingly, can human produce sound? 
We, humans, have a vocal cord inside our larynx. This cords will vibrate when we speak or scream, resulting in us to produce sound. Imagine, if this cords stop vibrating, no matter how hard we scream we still don't make a sound.  

When you whisper someone, your vocal cords will have small vibration, producing soft sounds. Conversely, when you scream, large vibration produces loud sounds. These sound levels can be measured using the sound level meter in the unit decibel (dB). Normally, a human can hear up to 140 dB, above this number can result in permanent hearing loss. Wearing ear defenders and closing doors and windows can help us protect our hearing. 

How do sounds travel?
Sounds can travel in three different matters like solids, liquids and gases. 
How sounds travel in three different matters
How sounds travel in three different matters 

The picture above shows how sounds can pass through solid, liquid and gas. We can hear different sounds in anywhere we are due to these matters are all around us. 

Sounds can be bent and absorbed depending on the type of the materials. Hard materials such as wall, stone and wood can bend sound. Soft materials such as carpets and sponges can absorb sound.

To understand more about sounds, you may watch this video:



So that's the explanation of sounds, I hope that it can help you understand about it. 

Now, let's try this!

These sounds have sound levels in 10 dB, 60 dB, 85 dB, 120 dB and 130 dB. Match these sound levels with the type of sounds below. 
  • Hairdryer blowing = …… dB
  • Human breathing = ……..dB
  • Aeroplane taking off = ……….dB
  • Background music playing = ……….dB
  • Siren sounding = ……….. dB
Please submit your answer in the following comment box!.

Your loyal Cap. Idaa 
Ciao


Learn Also:

38 comments

  1. Bryan Evan thamsil23 April 2020 at 11:03

    1.60
    2.10
    3.130
    4.85
    5.120

    ReplyDelete
  2. Hairdryer blowing = 120 dB
    Human breathing = 65 dB
    Aeroplane taking off = 130dB
    Background music playing = 60 dB
    Siren sounding = 10 dB

    ReplyDelete
  3. Hairdryer blowing = 85 dB
    Human breathing = 10 dB
    Aeroplane taking off = 130 dB
    Background music playing = 60 dB
    Siren sounding = 120 dB

    ReplyDelete
  4. Dzakiir:Hairdryer blowing = …60… dB
    Human breathing = …10…..dB
    Aeroplane taking off = ……130….dB
    Background music playing = …120…….dB
    Siren sounding = ……85….. dB

    ReplyDelete
  5. Chilla:Hairdryer blowing = …85… dB
    Human breathing = ……10..dB
    Aeroplane taking off = ……130….dB
    Background music playing = …120…….dB
    Siren sounding = ……85….. dB

    ReplyDelete
  6. Chilla:Hairdryer blowing = …85… dB
    Human breathing = ……10..dB
    Aeroplane taking off = …130…….dB
    Background music playing = ……120….dB
    Siren sounding = ……….60. dB

    ReplyDelete
  7. Hairdryer blowing = 85 dB
    Human breathing = …10..dB
    Aeroplane taking off = ……130….dB
    Background music playing = …120….dB
    Siren sounding = …60….. dB

    ReplyDelete
  8. Human breathing:10 dB
    Airplane taking off:130 dB
    Background music playing:120 dB
    Sirens sounding:80dB
    Hairdryer blowing:60 dB

    ReplyDelete
  9. Hairdryer blowing =85 dB.

    Human breathing =10 dB.

    Aeroplane taking off =130 dB.

    Background music playing =60 dB.

    Siren sounding =120 dB.

    ReplyDelete
  10. Hairdryer blowing: 85 dB
    Human breathing: 10 dB
    Aeroplane taking off: 130 dB
    Background music playing: 60 dB
    Siren sounding: 120 dB
    -Radithya-

    ReplyDelete
  11. Hairdryer blowing = 60 dB
    Human breathing = 10 dB
    Aeroplane taking off = 130 dB
    Background music playing = 85 dB
    Siren sounding = 120 dB

    ReplyDelete
  12. hairy blowing:85db
    human breathing:10db
    aeroplane taking off:130db
    backroundmusic playing:60 db
    siren sounding:130db

    ReplyDelete
  13. Hairdryer blowing = …85… dB
    Human breathing = 10..dB
    Aeroplane taking off = …130.dB
    Background music playing = ……120….dB
    Siren sounding = ……60….. dB

    ReplyDelete
  14. 1.85db
    2.10db
    3.130db
    4.60db
    5.120db

    ReplyDelete
  15. Hairdryer blowing:130 db
    Human breathing:10 db
    Aeroplane taking off:85 db
    Background music playing:60 db
    Siren sounding: 120 db

    Fay

    ReplyDelete
  16. Hairdryer blowing=85 dB
    Human breathing=10 dB
    Areoplane taking off=130dB
    Background music playing=60dB
    Siren sounding=120 dB

    ReplyDelete
  17. Hairdryer blowing:85 DB
    Human Breathing:10 DB
    aeroplane Taking Off:130 DB
    Background music playing:120 DB
    Siren Sounding: 60 DB

    Keisya~

    ReplyDelete
  18. 1.85db
    2.10db
    3.130db
    4.60db
    5.120db
    Ishaq

    ReplyDelete
  19. hairy blowing:85db
    human breathing:10db
    aeroplane taking off:130db
    backroundmusic playing:60 db
    siren sounding:120db

    ReplyDelete
  20. Hairdryer blowing=85 db
    Human breathing=10 db
    Aeroplanetaking off =130 db
    Background music playing =60 db
    Siren sonding=130 db

    ReplyDelete
  21. Siren sonding =120 db

    ReplyDelete
  22. Hairdryer blowing = 120 dB
    Human breathing = 65 dB
    Aeroplane taking off = 130dB
    Background music playing = 60 dB
    Siren sounding = 10 dB
    Asyraf

    ReplyDelete
  23. Hairdryer blowing=85 db
    Human breathing=10 db
    Aeroplanetaking off =130 db
    Background music playing =60 db
    Siren sonding=130 dbp
    Mellania

    ReplyDelete
  24. In physics sound is a vibration that propagates as an acoustic wave trough a transmission medium such a gas liquid or solid in human physiology and physicology sound is the reception of such waves and their perception by the brain

    ReplyDelete
  25. Human breathing:10 db
    Hairdryer blowing:60 db
    Background music:80 db
    Siren:12O
    Airplane:130

    ReplyDelete
  26. Hairdryer blowing=120 dB
    Human breathing=65 dB
    Aeroplane taking off=130 dB
    Background music playing=60 dB
    Siren sounding=10 dB
    Komang

    ReplyDelete
  27. 1. 80
    2. 10
    3. 130
    4. 60
    5. 120

    by: Samuel

    ReplyDelete
  28. Hairdryer blowing = 85 dB
    Human breathing = 10 dB
    Aeroplane taking off = 130 dB
    Background music playing = 60 dB
    Siren sounding = 120 dB

    ReplyDelete
  29. hair dryer=60db
    human breathing=10db
    aeroplane taking off=130db
    back round musik playing=120db
    siren sound=85db

    ReplyDelete
  30. 1.hairdryer blowing=60 db 2.humans breathing=10 db 3.aeroplane taking off=130 db 4.background music playing=85 db 5.siren sounding=120 db by Hafizh

    ReplyDelete
  31. •85 dB
    •10 dB
    •130 dB
    •120 dB
    •60 dB

    ReplyDelete
  32. Hairdryer blowing:85 dB
    Airplane taking off: 130 dB
    Background music playing: 60 dB
    Siren sounding: 120 dB
    Air breting: 10 dB

    ReplyDelete
  33. •85
    •10
    •130
    •60
    •120

    ReplyDelete
  34. Hair dryer blowing=85db
    Human breathing=10 db
    Aero plane taking off=120db
    Back ground music playing=20 db
    Siren sounding=150 db

    ReplyDelete
  35. From Prima anastasya tanggo
    A. Hair dryer 85 db b. Human breath 10db c Aeroplane taking off 130 db
    D background music playing 600 db
    E.siren sounding=120 db

    ReplyDelete
  36. Hair Dryer:85 DB
    Human Breathing: 10 DB
    Aeroplane taking off:130 DB
    Back ground Music Playing: 600 DB
    Siren sounding :120 DB
    Richelle 4B

    ReplyDelete

Thank you for reading, please leave a comment! ^^

Latest Instagrams

© Sluggish🐌journey. Design by FCD.