Answer the question and I will mark brainless
Which answer is another way of saying vocalizations?
A.
the effort of making vocal sounds
B.
the person who makes vocal sounds
C.
the desire to make vocal sounds
D.
the act of making vocal sounds
the story:
What's in a Sound?
1
What did you hear as you walked to the bus stop or to school this morning? Depending on the time of year, you may have noticed the joyful sound of birds singing in the trees and smiled to yourself. You were probably aware of the cars and trucks that loudly rumbled past you while you strolled down the sidewalk. If you were listening closely, you may have overheard children laughing, music spilling from homes with open windows, and many, many other sounds. Have you ever wondered why the noises made by various people, animals, and objects are so different? This can partially be explained by two important qualities of sound.
2
Volume is one characteristic of sound. It refers to how loud or how quiet a sound is. For example, the volume of a whisper is much lower than that of a scream. Volume is usually measured in decibels. The quietest sound any person can hear is 0 decibels. If people are exposed to sounds louder than 85 decibels for extended periods of time, they could lose some of their hearing ability. For instance, people should not be exposed to sounds that are 85 decibels for more than four hours at a time. Sounds that are 110 decibels or louder are very dangerous, and can very quickly damage the structures that allow you to hear.
3
Sounds can also be very different in terms of pitch. This property is slightly more difficult to explain than volume. Pitch refers to how high or low a sound is. The buzz of a bee and the roar of a lion are low-pitched sounds. Whistles and telephones are both examples of objects that produce high-pitched sounds. Higher-pitched sounds have higher frequencies. Lower-pitched sounds have lower frequencies. People can hear sounds that are between about 20 and 20,000 hertz (the unit used to measure frequency). Animals can also hear sounds at a range of frequencies.
4
As you can see, there are a number of ways to measure and describe the sound. The properties discussed above help explain why a cricket’s song is so different from an angry lion’s roar. The information can also help you limit exposure to sounds that may damage your hearing.
story 2:
The smooth sound of a saxophone combines with the silky vocalizations of a jazz singer. The hum of violins blends in perfect harmony with the clear, high notes of a trumpet in an orchestra. Whatever instruments you prefer, they all produce different pitches and volumes.
2
The volume describes how loudly or softly an instrument is played. Some instruments are louder than others. A single instrument can be played loudly or softly. Striking piano keys with force makes a louder sound than softly pushing them does. Volume, measured in decibels, is a measure of how loud a sound is. If you know the volume levels of various instruments, you can protect your hearing. Too much exposure to very loud instruments could be dangerous.
3
Instruments can also produce a specific range of pitches. The property of pitch is a little more challenging to understand than volume. Pitch is how high or low a note is on a musical scale. The triangle and bass drum illustrate this concept. A triangle produces a high-pitched sound, while a bass drum produces a low-pitched sound. Pitch is measured in Hertz (Hz), which refers to how fast sound waves vibrate.
4
Some people say that loud music can make them feel happy, or that low pitches make them feel sad. However, pitch and volume alone cannot be used to predict whether an individual will feel happy or blue in response to the sound of an instrument. Music is a matter of personal taste. Once the ear detects it, every individual will have a different emotional response.