You may be surprÂ­ised to discover that a carbon monoxide (CO) detector really isn't a complicated piece of equipment. Housed inside a plastic chamber approximately 3 inches (7.6 centimeters) in diameter are parts that work in unison to alert a househoÂ­ld when lethal gas is detected.
This type of noise is usually caused by malfunctioning valve lifters or an exhaust manifold leak. If the noise lasts for more than a minute and completely disappears or dimishes after the engine is warm, the most likely cause is an exhaust manifold leak.
sound in the near-field, which can affect the resonant vibration modes of the nearby structures. typically produces an uncertainty of as much as about 10-15 dB noise level. improved method to estimate the acoustic effects of clustered rocket thrusters. jets (Fisher et al.8'9; Garrison et al.'Â°). engines, while the present work is concerned primarily with application to rocket engines and launch acoustics.