3. Humans can detect a difference in sound intensity levels of 1.0 dB. What is the ratio (louder to softer) of the sound intensities? (4) 4. You are flying in an ultra-light aircraft at a speed of 39 m/s. An eagle, whose speed is 18 m/s, is flying directly toward you. Each of the given speeds is relative to the ground. The eagle emits a shrill cry whose frequency is 3400 Hz. The speed of sound is 330 m/s. What frequency do you hear? (3) 5. Describe the properties of a wave (3)
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The decibel scale is logarithmic, meaning that an increase of 10 dB represents a tenfold increase in intensity. Therefore, an increase of 1 dB represents a ratio of approximately 1.26 (10^(1/10)) in sound intensity. So, the ratio of the sound intensities for a 1 Show more…
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You are flying in an ultra-light aircraft at a speed of $39 \mathrm{~m} / \mathrm{s}$. An eagle, whose speed is 18 $\mathrm{m} / \mathrm{s}$, is flying directly toward you. Each of the given speeds is relative to the ground. The eagle emits a shrill cry whose frequency is $3400 \mathrm{~Hz}$. The speed of sound is $330 \mathrm{~m} / \mathrm{s}$. What frequency do you hear?
You are flying in an ultralight aircraft at a speed of 39 m/s. An eagle, whose speed is 18 m/s, is flying directly toward you. Each of the given speeds is relative to the ground. The eagle emits a shrill cry whose frequency is 3400 Hz. The speed of sound is 330 m/s. What frequency do you hear?
'1 _ The rate at which energy flows through a unit area perpendicular to the direction of wave motion: 2_ Human hearing depends on both the and the intensity of sound waves 3 The intensity of sound is inversely proportional to the square of the distance from the source. 4_ It is the softest sounds that can be heard by the average human ear: 5. It is determined by relating the intensity of a sound wave to the intensity of the threshold of hearing: 6. A condition that exists when the frequency of a force applied to a system matches the natural frequency of vibration of the system:'
Manish J.
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