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# Solution: What is the expected critical frequency for a 120 mm thick brick wall?

#### Problem Statement: Acoustics, Broadcasting and Cable TV Systems Systems

Acoustics Problem Solving

What is the expected critical frequency for a 120 mm thick brick wall? Assume a longitudinal wave velocity in brick of 2350 m/s and that the velocity of sound in air is 330 m/s.

a. 114.5 Hz

b. 214.5 Hz

c. 314.5 Hz

d. 414.5 Hz

The expected critical frequency for a 120 mm thick brick wall is equal to 214.5 Hz

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