Noise barriers block high frequencies but let low frequencies pass around them
Evidence
Figure 2.17 shows a typical case where a noise barrier is used to mask noise sources, such as vehicles on a highway, to decrease disturbance in the environment. At high frequencies, where the wavelength is small compared to the barrier, shadowing due to the barrier is efficient. At low frequencies, however, the sound waves propagate around the barrier so that the desired masking remains relatively small. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 260
Categorization
Category: Factual Claims
- QUESTION: Implication: for human speech privacy and wildlife noise mitigation, low-frequency content is the hard problem acoustic barriers can’t solve — what approaches beyond barriers exist?