Not a continuous source of sound. A vehicle alarm siren is usually is intermittent
cacophony
104dB
The lines in a spectroscope tell what element(s) are being observed. The continuous color are background noise or put there for a reference.
is making - present continuous verb phrase
have you checked your car for aliens?
is making - present continuous verb phrase
The sound of a jet can be described as a loud, roaring noise. It is often compared to a continuous thunder or rumble.
The sound of ear rumbling resembles a low, continuous rumbling or thunder-like noise.
The term that describes the noise pollution resulting from the operation of a racetrack is "ambient noise." This type of noise pollution is characterized by continuous, unwanted sounds that can disrupt the tranquility of nearby environments and negatively impact the quality of life for residents living close to the racetrack.
A key on the key board is stuck in the down position
It is warning you that your seat belt isn't fastened.
top 6: engine, muffler, horn, exhaust, flat tire, and springs Continuous mechanical noise sources: Engine and rotating parts, drive belts, transmission, wheel and axle bearings, tires, exhaust systems. Continuous external noise sources: road surfaces, wind noise. Sporadic noise sources: Engine misfire or pre-ignition, power steering rack and other steering parts, drive belt noise, brakes, exhaust system, shock absorbers, suspension, loose interior parts (dash board, window regulators), heater/AC fan, wheel bearings (sometimes noticeable only when turning).