What is the unit used for acoustic impedance?

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Multiple Choice

What is the unit used for acoustic impedance?

Explanation:
Acoustic impedance is the ratio of the pressure in the sound field to the particle velocity. Since pressure is measured in Pascals and velocity in meters per second, the impedance has units of Pascals per (meter per second), which simplifies to N·s/m^3. This unit is called the Rayl. So the Rayl is the standard unit for acoustic impedance. Pascals measure pressure, meters per second measure speed, and decibels measure level ratios, not impedance.

Acoustic impedance is the ratio of the pressure in the sound field to the particle velocity. Since pressure is measured in Pascals and velocity in meters per second, the impedance has units of Pascals per (meter per second), which simplifies to N·s/m^3. This unit is called the Rayl. So the Rayl is the standard unit for acoustic impedance. Pascals measure pressure, meters per second measure speed, and decibels measure level ratios, not impedance.

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