If it is a sounds that is variable with the speed of the vehicle it is probably the rear pinion gear. I have an Aerostar with 198,000 miles and just had to replace the rear axle because of this problem. It is potentially dangerous because the bearing failure causes the pinion gear to heatup drastically which turns it a blue color and destroys its strength which could lead to an axle shaft failure under load. It costs approximately $1200 to repair or you can usually find a salvage unit with life left in it for around $400.
The noise could be heard for over 3,000 miles
Check the tires for cupping. If you have had an alignment problem the tires could be cupping and will make quite a lot of noise. It could also be a wheel bearing.
your strut mount could be bad
If the slapping noise gets progressively faster as the tires turn, check for a large nail or rock in the tire tread.
Prior to noise pollution caused by ships, whales song could travel over 6000 miles.
The explosion from the Krakatoa volcano in Indonesia is the loudest sound ever to be heard. It could be heard from over 3,000 miles away.
Worn main and rod bearings. It could last for a while if you nurse it.
You have a rod nocking ,you could have a cv joint going out mine took about 1000 miles before it went
Noise is common from any engine, the TYPE of noise is what you should worry about. Is it a knocking noise? hum? squeak? rattle?
We need some more information to have a chance of hitting this one. Could be a cat under the hood, could be a clogged oil pump, oil, bad lifters or???? What kind of car and what engine? How many miles, and any recent maintenance? how long does the noise last and what does it sound like?
In recent history it was probably the eruption of Krakatoa in the Sundra Straits, August 1883. The noise was heard 3000 miles away
Check water pump they go out around 100,000 miles will start to make noise sometimes first
If you hear it only at idle and sounds faint, it is your rocker shaft. They wear on the end and makes a slight ticking noise. Mine has done it for over 100k miles and no problems. I hope you have done reg maint and kept oil changed.
most of the time when a u-joint starts going out it will make noise in rewind first
It could be your bearing are bad.
There are several possibilities: the tires could be worn or have deep "lugs". If the tires have worn with "cupping" they could be making noise. If it isn't the tires, it could be the drive shaft or the drive-shaft carrier bearing if it's a 2-piece drive shaft. Another possibility is the differential. If the noise only happens when accelerating or decelerating it could be the differential ring/pinion gear alignment or wear to the ring/pinion gear.
The common Spitfires could fly about 800 miles. Some versions could do over 1,000 miles.
wheelbearing or cv axle enjoy
it could be a number of things ranging from low oil, worn valve seats, worn or broken springs.
ticking noise is usually "lifter noise". if this noise increases in speed when accelerating then it is "lifter noise". just change your oil.and or maitain proper oil level.try using a medium to thick oil 20/30 20/50 , there is a product call lucas which also helps your oil lubricate the engines moving parts easier. i have use it, and it works , it takes a few miles but it works.
it helps you to hear far away noise even if its half miles
The humming noise can be in your exhaust system. The exhaust will heat up and seal the area where there can be a leak. The hot exhaust will cause the noise to decrease.
36 square miles is an area. Could be 6 x 6 miles, or 4 x 9 miles, or could be any shape.
In order to tell you that you would have to describe the noise and what the car is doing when the noise is made. Are you idling, driving, just turned the AC on? What is occurring and what is the noise? Idling and sounds worse when AC is on. Sounds like it is coming from the top of the engine. Vehicle has 120k miles
They will make a grinding noise that's how you can tell.