Nature of Sound
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Frequency | show 🗑
|
||||
| show | 20-20,000 Hz, if enough amplitude
🗑
|
||||
| show | 220 Hz
🗑
|
||||
| show | cycles per second
🗑
|
||||
| show | amount of disturbance of the air (loudness). low=quiet. high=loud.
🗑
|
||||
| vibration is... | show 🗑
|
||||
| What, combined, define the basic elements of sound? | show 🗑
|
||||
| show | high pressure air behind ear drums expands as outside pressure drops. to equalize pressure you open a small tube in the throat (Eustachian tube) that connects to that space behind your ear drum
🗑
|
||||
| show | It is driven by air from the lungs passing through vocal folds. Muscles attached to cords pull them tight -> they flap rapidly (VIBRATE) and MODULATE the air stream
🗑
|
||||
| show | vary in a regular fashion
🗑
|
||||
| show | mechanism called an edge (creates an edgetone)
🗑
|
||||
| show | blow harder to speed up the air flow
🗑
|
||||
| How does an edge tone work? | show 🗑
|
||||
| show | A flexible, thin, springy reed at one end of a tube vibrates. The reed opens and closes like vocal folds. Finger holes change length of the tube. Reed vibrates at a speed that matches tube length.
🗑
|
||||
| How do brass instruments work? | show 🗑
|
||||
| show | Sets of notes that each tube length of a brass instrument plays.
🗑
|
||||
| Why do brass instruments have multiple tubes? | show 🗑
|
||||
| show | Pressing valves re-routes air to different length tube paths
🗑
|
||||
| show | Strings are coupled to a resonating box, and are VIBRATED by plucking or bowing. Change string length to change pitch (long=low, short=high)
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
mortehay000
Popular Sanskrit sets