11 HW Sound Intensity, Loudness, Pitch
0.0(0)
Studied by 0 people
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt PlayCard Sorting
1/15
Last updated 12:58 PM on 3/1/23
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai |
|---|
No analytics yet
Send a link to your students to track their progress
16 Terms
1
New cards
A weird thing about loudness and intensity - it’s not a linear relationship.
Generally, a sound wave needs to have _ times the intensity to sound twice as loud to us.
Generally, a sound wave needs to have _ times the intensity to sound twice as loud to us.
10
2
New cards
Just as there’s a range of pitches that humans can hear, there’s also **a range of sound wave intensity** that humans can comfortably hear.
Generally, people can **safely** hear sounds from about _. (keyword is safely)
\
(although we will HEAR sounds of a roaring jet plane they tend to hurt our ears)
Pico - is a unit prefix in the metric system. Pico is a factor of 1 trillionth (0.000000000001). That is 10-12
\
\
Generally, people can **safely** hear sounds from about _. (keyword is safely)
\
(although we will HEAR sounds of a roaring jet plane they tend to hurt our ears)
Pico - is a unit prefix in the metric system. Pico is a factor of 1 trillionth (0.000000000001). That is 10-12
\
\
1 picowatt per square meter, up to 1 Watt per square meter
\n
\n
3
New cards
When your eardrum vibrates, your brain then interprets those vibrations as sound.
true
\n
\n
4
New cards
Humans hear sounds best when the vibrations are somewhere between 20 per second on the low end and _ the high end.
\n
\n
20,000 vibrations per second (20,000 Hz)
\n
\n
5
New cards
You’ll notice that as the source of a sound moves closer to you, it gets louder, and as it moves away, it gets softer. That makes sense since the closer you are to the source of a sound, the greater the intensity of the wave that hits your ear.
But have you ever noticed that the pitch of the sound changes, too? It’s called the "_".
\n
But have you ever noticed that the pitch of the sound changes, too? It’s called the "_".
\n
\n doppler effect
\n
\n
6
New cards
Say you get a text message on your phone, and it makes a nice, bright little ‘ding!’ sound. What actually happened?
\
When you got the message, the _ inside the speaker made the _ move back and forth, which vibrated the _ back and forth.
\n
\
When you got the message, the _ inside the speaker made the _ move back and forth, which vibrated the _ back and forth.
\n
(1) electronics, (2) diaphragm, (3) air
\n
\n
7
New cards
Sounds that are too high in pitch are called _.
\n
\n
ultrasonic
\n
\n
8
New cards
As a source of sound moves away from you, the pitch of the sound you hear _.
\n
\n
\n decreases
\n
\n
9
New cards
As a source of sound moves toward you, the pitch of the sound you hear _.
\n
\n
increases
\n
\n
10
New cards
Sounds that are too low are called _.
\n
\n
infrasonic
\n
\n
11
New cards
The air that’s vibrating back and forth more times per second will have a _ pitch, and air that’s vibrating fewer times per second will have a _ pitch.
\n
\n
higher, lower
\n
\n
12
New cards
Another aspect that shapes sound is its **loudness** - when you increase the **intensity** of a sound, you increase its loudness, and vice versa.
\
Sound **intensity** is measured in _.
\
Sound **intensity** is measured in _.
Watts per square meter
\n
\n
13
New cards
Pitch can be high or low, and it corresponds to the ‘frequency’ of the wave.
\n
\n
true
14
New cards
The intensity of a wave is _ to the wave’s amplitude, squared.
\n
proportional
\n
proportional
\n
15
New cards
The differences in _ cause the diaphragm to move back and forth, which electronics then translate into audio data.
\
\
pressure
\n
\n
16
New cards
As we get older and lose more of the cells that help us detect sound, we start to lose the ability to hear _ sounds. \n
higher-pitched (higher frequency)
\n
\n