Decreased intensity, increased return time, and decreased perceived frequency.

The bat emits short pulses of ultrasonic waves, which return as echoes after hitting objects in the environment, providing information about their dimensions, locations, and possible movements. This is due to the bat's sensitivity in detecting the time it takes for the echoes to return, as well as small variations in the frequencies and intensities of the ultrasonic pulses. These characteristics allow it to hunt small prey even when they are in motion relative to it. Consider a one-dimensional situation in which a moth moves away, in uniform linear motion, from a resting bat. The distance and speed of the moth in the described situation would be detected by the bat's system through what changes in the characteristics of the ultrasonic pulses?

When the moth moves away from the bat, the intensity of the returning ultrasonic echo decreases as the sound energy disperses over distance. The echo return time increases because the moth is moving away, increasing the distance the sound needs to travel. The perceived frequency decreases due to the Doppler effect, which causes a decrease in the perceived sound frequency when the sound source is moving away from the observer. Therefore, the correct alternative is 'Decreased intensity, increased return time, and decreased perceived frequency.'

The bat emits short pulses of ultrasonic waves, which return as echoes after hitting objects in the environment, providing information about their dimensions, locations, and possible movements. This is due to the bat's sensitivity in detecting the time it takes for the echoes to return, as well as small variations in the frequencies and intensities of the ultrasonic pulses. These characteristics allow it to hunt small prey, even when they are in motion relative to it. Consider a one-dimensional situation in which a moth moves away in a straight and uniform motion from a resting bat. The distance and speed of the moth in the described situation would be detected by the bat's system through which changes in the characteristics of the ultrasonic pulses?

The bat uses echolocation to detect objects. When the moth moves away, the intensity of the echo decreases as the energy of the sound waves disperses over distance. The echo return time increases as the sound wave takes longer to travel to the moth and back. The perceived frequency decreases due to the Doppler effect, as the moth is moving away from the bat, making the sound waves appear to have a lower frequency to the bat. Therefore, the correct alternative is 'Decreased intensity, increased return time, and decreased perceived frequency.'

Sound is a mechanical wave that propagates through the air, and its physiological qualities are related to the characteristics of the wave itself. What differentiates sounds produced by the same source is their frequency, which is measured in Hertz (Hz). The higher the frequency, the higher the pitch of the emitted sound. What is the unit of measurement for the lowest sound?

Sound intensity depends on frequency, amplitude, wavelength, and the medium in which it propagates. Since sounds can be produced with different frequencies, what are the main divisions in the frequency spectrum?

Sound intensity is a physical quantity that indicates the amount of energy carried by sound waves. It is measured in decibels (dB), which is a logarithmic unit to represent the relationship between the power of a sound and a reference power. Which of the following statements is true?

Question bank: Waves: Sound Intensity

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