The unit for sound pressure is:

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Multiple Choice

The unit for sound pressure is:

Explanation:
Sound pressure is described using the SI unit pascal, which is newtons per square meter. Pressure is force per area, and the small fluctuations in atmospheric pressure caused by a sound wave are measured in pascals. Decibels express how strong the pressure is on a logarithmic scale relative to a reference pressure, so they are a relative level, not the direct unit of pressure. Hertz tells you the frequency (cycles per second) of the pressure oscillation, not its magnitude. Watts per square meter represents sound intensity—how much acoustic energy crosses a unit area per second—again not the pressure itself. Therefore, the correct unit for sound pressure is Newtons per square meter (pascals).

Sound pressure is described using the SI unit pascal, which is newtons per square meter. Pressure is force per area, and the small fluctuations in atmospheric pressure caused by a sound wave are measured in pascals. Decibels express how strong the pressure is on a logarithmic scale relative to a reference pressure, so they are a relative level, not the direct unit of pressure. Hertz tells you the frequency (cycles per second) of the pressure oscillation, not its magnitude. Watts per square meter represents sound intensity—how much acoustic energy crosses a unit area per second—again not the pressure itself. Therefore, the correct unit for sound pressure is Newtons per square meter (pascals).

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