The MK 2(G) acoustic sweep is commonly known as which?

The MK 2(G) acoustic sweep is commonly known as which?

• A. Parallel pipes towed broadside
• B. A Bernoulli device
• C. Bubble curtains
• D. Rattle bars

Answer: (D)

The MK 2(G) acoustic sweep is commonly known as rattle bars because it looks and behaves like a set of metal bars that rattle against each other as the tow runs. This mechanical rattling creates a broad, irregular noise over a wide range of frequencies, specifically designed to trigger acoustic mines that listen for those signals. The distinctive rattling sound is the defining feature, which is why the nickname stuck. Other options describe different concepts (bubble curtains generate bubbles to mask sounds, a Bernoulli device relates to fluid dynamics, and parallel pipes towed broadside wouldn’t produce the characteristic bar-rattle noise), so they don’t fit the device’s purpose or sound signature.

The MK 2(G) acoustic sweep is commonly known as rattle bars because it looks and behaves like a set of metal bars that rattle against each other as the tow runs. This mechanical rattling creates a broad, irregular noise over a wide range of frequencies, specifically designed to trigger acoustic mines that listen for those signals. The distinctive rattling sound is the defining feature, which is why the nickname stuck. Other options describe different concepts (bubble curtains generate bubbles to mask sounds, a Bernoulli device relates to fluid dynamics, and parallel pipes towed broadside wouldn’t produce the characteristic bar-rattle noise), so they don’t fit the device’s purpose or sound signature.