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Chapter 27: Problem 50

You are having a debate with someone in a library. A librarian asks you to 鈥渟peak softer.鈥� What characteristic of sound does the librarian want you to change and how can you change it? a. wavelength, by lowering the amplitude at which you are speaking b. amplitude, by lowering the frequency at which you are speaking c. frequency, by lowering the volume at which you are speaking d. amplitude, by lowering the volume at which you are speaking.

Short Answer

Expert verified
d. amplitude, by lowering the volume at which you are speaking.

Step by step solution

01

Understanding the Problem

Identify what characteristic of sound the librarian wants to change when asking to 'speak softer.'
02

Identifying Key Terms

Define key terms: amplitude, frequency, wavelength, and volume.
03

Connecting Key Terms with the Request

Relate the term 'speak softer' to the sound characteristic that needs to be altered.
04

Choosing the Correct Option

Analyze the options and select the one that correctly matches the characteristic of sound that should be changed and the way to change it.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Amplitude
Amplitude is one of the main characteristics used to describe sound. The amplitude of a sound wave refers to the height of the wave, which represents the energy or power of the sound. The larger the amplitude, the louder the sound, and vice-versa. Amplitude is usually measured in decibels (dB). To 'speak softer,' you need to reduce the amplitude of your voice. This will lower the volume, making the sound quieter. This is why the librarian asked you to 'speak softer,' as reducing the amplitude will result in a softer sound that won't disturb others.
Frequency
Frequency is another important characteristic of sound. It refers to the number of wave cycles that pass a point in one second. Frequency is measured in Hertz (Hz). High frequencies produce higher-pitched sounds, while low frequencies generate lower-pitched sounds. Changing the frequency alters the pitch rather than the loudness of the sound. Therefore, adjusting the frequency won鈥檛 help if you need to 'speak softer.' It's more about changing the tone or pitch of your voice.
Wavelength
Wavelength is directly related to the frequency of a sound wave. It is the distance between successive crests (or troughs) of a wave. In sound, wavelength is inversely proportional to frequency: higher frequencies have shorter wavelengths, and lower frequencies have longer wavelengths. While wavelength is critical in understanding sound waves, it is not the characteristic you would alter to 'speak softer.' Wavelength affects the pitch of the sound, not the volume.
Volume
Volume refers to the perceived loudness of a sound and is closely tied to amplitude. The louder the sound, the higher the amplitude. When the librarian asked you to 'speak softer,' they essentially asked you to reduce the volume of your voice. You achieve this by decreasing the amplitude, which makes the sound less intense and therefore quieter. Adjusting the volume is a practical way to ensure that your voice is at an appropriate level for the environment, such as a library.

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