Question 1

Having two ears MOST helps us to:

Accepted Answer

The answer of Having two ears MOST helps us to:
...

Question 2

Loudness is determined by the _____ of a sound wave.

Accepted Answer

Loudness is primarily determined by the amplitude of a sound wave, which is the measure of the height of the wave. A larger amplitude means a louder sound. Frequency, purity, and timbre can affect the perceived quality of the sound, but not necessarily the loudness.

Question 3

Sound-wave frequency is to pitch as amplitude is to:

Accepted Answer

Amplitude refers to the strength or intensity of a sound wave, and it is closely related to the perception of loudness. Therefore, the best choice is D, as timbre, quality of sound, and complexity are not directly related to amplitude.

Question 4

In 2014,Axl Rose was voted the greatest rock vocalist ever,in part due to his unique raspy voice that is impossible to truly duplicate.Many people find Axl's vocals interesting due to these variations in sound,which is related to the _____ of his vocals.

Accepted Answer

Axl Rose's vocal style is known for its complexity, as he often employs a wide range of vocal techniques including screaming, falsetto, and growling. This complexity creates the variations in sound that make his vocals so unique and difficult to replicate.

Question 5

Any sound above _____ db is enough to produce hearing damage,depending on the length and type of exposure.

Accepted Answer

According to the Occupational Safety and Health Administration (OSHA), exposure to sound levels above 85 dB for extended periods of time can result in hearing damage. Therefore, option C is the correct choice.

Question 6

Counting how often the peaks of a sound wave pass a microphone is a measure of its:

Accepted Answer

Counting how often the peaks of a sound wave pass a microphone is a measure of its frequency. Frequency refers to the number of cycles of a wave that occur in a second and is typically measured in hertz (Hz). Amplitude refers to the strength or intensity of the wave, complexity refers to the shape and variety of the wave, and decibel level refers to the scale used to measure the intensity of sound.

Question 7

The frequency of a sound wave is measured in cycles per second,or:

Accepted Answer

The frequency of a sound wave is measured in cycles per second, which is the unit of measurement known as hertz.

Question 8

As the number of cycles per second of a sound wave increases,we experience a _____ sound.

Accepted Answer

The answer of As the number of cycles per second...

Question 9

Perception of complex sounds begins when the inner ear breaks down the different _____ components of the sound wave.

Accepted Answer

The inner ear breaks down the different frequencies of a complex sound wave through a process called spectral analysis.

Question 10

In localizing the sources of sounds,we rely _____ difference of sounds in our two ears.

Accepted Answer

Localizing the sources of sounds rely on both the loudness and timing differences in the sounds that reach our two ears. The time delay between the arrival of sound at each ear and the difference in sound intensity, or level, at each ear provides our brain with cues to determine the location of the sound source.

Question 11

The loudness of a sound is measured in:

Accepted Answer

The loudness of a sound is measured in decibels (dB), which is a unit of measurement that evaluates the intensity or magnitude of sound pressure levels.

Question 12

The frequency of a sound wave determines its:

Accepted Answer

The frequency of a sound wave determines its pitch, which is how high or low a sound is perceived. Loudness is determined by the amplitude of the wave, timbre is determined by the combination of frequencies present in the wave, and decibel level is a measure of the intensity or power of the sound wave.

Question 13

The pitch of a sound corresponds to our perception of:

Accepted Answer

The pitch of a sound corresponds to how high or low we perceive the sound to be. This is determined by the frequency of the sound wave, with higher frequency waves producing higher pitched sounds and lower frequency waves producing lower pitched sounds.

Question 14

Sound waves are:

Accepted Answer

Sound waves are physical vibrations that propagate through a medium, typically air. They are characterized by changes in air pressure over time, creating compressions and rarefactions that our ears can detect. Therefore, option C is the best choice. The other options describe parts of the ear that respond to sound waves, but not the waves themselves.

Question 15

In 2014,Axl Rose was voted the greatest rock vocalist ever,in part due to his incredible vocal range.His vocals can range from very low to very high at the same decibel level,illustrating a tremendous ability to vary his:

Accepted Answer

Axl Rose's vocal range refers to his ability to hit high and low notes, which is directly related to pitch.

Answer: C 
 Timbre refers to the unique tonal quality of a person's voice, and Axl Rose's ability to vary his vocal range showcases his versatility in manipulating his tonal quality.

Question 16

The timbre of a sound is determined by its:

Accepted Answer

The complexity of a sound wave determines its timbre. Timbre refers to the quality of a sound that distinguishes it from other sounds of the same pitch and volume. The complexity of a sound wave determines the overtones and harmonics present in the sound, which ultimately determine its timbre. Amplitude relates to the loudness of a sound, frequency to its pitch, and harmony to the relationship between different notes sounding together.

Question 17

You hear the same note played at the same intensity by a flute and by a trumpet.What do you experience?

Accepted Answer

The flute and trumpet have different sound qualities due to their different shapes and materials, even when playing the same note at the same intensity.

Question 18

Babbling brooks and buzzing bees get their interesting sound qualities due to their:

Accepted Answer

The babbling brooks and buzzing bees have interesting sound qualities due to their complexity, meaning that their sound waves are made up of multiple frequencies. This creates a unique and varied sound that is pleasing to the human ear. Loudness and pitch may also play a role, but the complexity is the main factor in producing the interesting sounds. Purity is not a significant component in these natural sounds.

Question 19

The timbre of a sound relates to:

Accepted Answer

The timbre of a sound refers to the sound quality or resonance, which is related to factors such as the shape of the sound wave, overtones, and harmonics. It is distinct from pitch (A) and loudness (B), although it can influence our perception of both. The frequency of a pure tone (D) is related to its pitch.

Question 20

Another term for the frequency of a sound wave is its:

Accepted Answer

The frequency of a sound wave refers to the number of cycles or vibrations per second, which is represented by its wavelength. The other options (amplitude, complexity, decibel level) are related to other properties of a sound wave, such as its intensity, structure or loudness.

Quiz 4: Sensation and Perception-Part A