Keeping it Down: CE Proofing Sound Test Process

One of the provisions of the Recreational Craft Directive (RCD) requires marine crafts to comply with designated noise levels depending on the design category. Usually, this is done by conducting sound tests, as prescribed by the ISO 14509 directive. The sound test is required for fast water crafts that are 24 meters or below in length. Slower marine crafts need not undergo any sound test, as CE proofing procedures can simply compute for their output.

RCD sets the standard sound level for all marine crafts at a range between 67 and 75 decibels. Simply put, the boat subject for CE proofing must be as loud as a vacuum cleaner when oneĀ  stands near it. The standard sound level for marine crafts depends on the power output of the engine. Considering that some places in Europe are usually quiet, the marine craft must not create too much noise.

The sound test itself is very simple: a microphone will record the sound of a boat traveling at a speed of 38 knots or 44 miles per hour. The…

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