Best Answer

Here is what Contributors had to report on water pressure sounds: * First, the temperature of the water affects the internal diameter of the faucet and faucet neck where the water is delivered. Hot water coming through the faucet neck will cause inward expansion, parially closing off the neck and altering the acoustic characteristics of the faucet neck. Cold water will have the opposite effect. Second, hot water follows a different path from cold water. The hot water pipe will have a different length in most cases because it is coming from a different place; this, combined with the resonant frequency of the water heater itself, will alter the resonant frequency of the Plumbing compared to the (mostly) straight-through cold water pipes. * Actually pipes expand outward when hot. That is, they will have a larger diameter, both internally and externally. They also become longer. * The actual answer lies with cavitation of the water... which is where the sound is coming from in the first place.

* As the water crosses the partially opened valve of the faucet, it undergoes a rapid decrease in pressure. This decrease in pressure leads to the creation and collapse of tiny bubbles of water vapor and dissolved air in the water. This effect is called cavitation and is quite noisy as the small bubbles collapse and generate shock waves. -At colder temperatures, fewer and smaller bubbles with a shorter lifespan are created.

* At higher temperature, more, longer lasting, and larger bubbles (and the sound they make) are created. This changes both the pitch and intensity of the sound as the water temperature changes. It's also why you can change the sound by opening and closing the valve slightly, which changes the drop in pressure.

User Avatar

Wiki User

โˆ™ 2009-06-18 16:19:28
This answer is:
User Avatar
Study guides


20 cards

Who is known as the first African American scientist

What is Luis Alvarez's cultural background

What was Benjamin Banneker's ethnic background

Which scientist used mathematical knowledge to calculate the exact measurement of the meter

See all cards


20 cards

What are chromosomes made of

How are mitosis and meiosis similar

What is a gel electrophoresis chamber

In pea plants what are the two alleles for color

See all cards


20 cards

Which term explains whether an object's velocity has increased or decreased over time

Which of these is a characteristic of nonmetals

What is the only factor needed to calculate change in velocity due to acceleration of gravity 9.8 ms

What term is used to describe splitting a large atomic nucleus into two smaller ones

See all cards

Add your answer:

Earn +20 pts
Q: Why does hot water coming from a faucet have a different pitch noise than cold water coming from a faucet at the same pressure?
Write your answer...
Related questions

What causes a whistling noise coming from the shower faucet the faucet to fill the tub the whistling is constant Any ideas on how to fix it and if it going to cause serious problems?

A whistling noise coming from the shower faucet or when filling the bathtub could mean that there is excess air in the water line. This can be fixed by turning off the major water supply valve and then opening all of the faucets in the home for about 5 minutes. Shut all of the faucets off, then turn the water supply back on.

Why does a 1996 dodge stratus make a knocking noise when in reverse?

Where is the noise coming from? If its from the fenders or wheels is a much different problem than if its coming from the transaxle.

You hear noise coming out of your muffler what could be the problem?

the reason you here noise from your muffler are because less pressure from your engine is going fast.

Your water pipes in your bathtub make a howling noise. When you open the sink faucet it stops or if you wait long enough it stops on its own. How do you solve this problem?

Could be the washer vibrating in the bath faucet/mixer. Over time, washers can degrade and become floppy or develop a rough surface. High pressure water over the surface can act like air past a clarinet reed. Opening the sink faucet takes the water feed pressure off the bath faucet, stopping the vibration.

Why does the old exterior faucet make a whining noise when turned on?

Loose washer

Is the movie joyful noise coming out on DVD soon?

Joyful Noise is coming out on DVD in June 2012

What causes the faucet to whistle when turning off the water?

The whistling noise is caused by a restriction in the flow of water that is under pressure. Some faucets that are close to needing rebuilding will whistle as the water is shut off as there is a small leakage occurring.

What could the noise be coming from my corsa?

Describe the noise and the general area it is coming from and I would glad to answer the best way I can.

Why does my New faucet makes clunking noise?

There was air in the line. When you turn off the water with the faucet running make sure you turn it back on with the faucet open. That will release any air caught in the lines. That faucet shut with one on a lower floor on and restoring water does not work. Fast and easy. 1. turn on affected faucet 2. shut off water 3. turn water back on 4. faucet should be running smoothly now

How would you know if you have a leak on your muffler?

usually you will be able to hear a abnormal sound coming from the exhaust. it may have become louder or when you reach higher rpm you can hear a high pitch noise coming from the in higher pressure in the exhaust being pushed out the small hole or if its a big hole you will definatly notice an increase in noise.

Why does my engine make a tapping noise at idle?

possibly low oil or low oil pressure, the tapping may be coming from the oil operated hydraulic lifters.

2008 2500 Sierra Diesel GMC 4X4 that has a piercing noise coming inside the cab when back windows are open The pressure hearts our ears Where do I find information on how to correct this problem?

The noise is coming from the air being sucked out of the cab thus the lack and change of pressure. Simple solution, roll down the front windows just an inch or so and all of this will go away.. Let me know if this works.

What is the noise i will be hearing inside of my stomach when my baby will be moving around it sounds like her little bones popping inside of me?

the pressure of them coming into unison not formal formation confided..............

Your 92 Saturn has a clicking noise coming from the middle console even when the key is not on and is draining your battery?

The noise is coming from the passive restraint module.

What is the noise coming from my car?

Uhh well with what you have said it could be anything, you'de need more info on what kind of noise it is, and wheres it coming from.....

What is the cause of manual transmission whine noise at idle and it disappear when fully depressing the clutch?

That noise is coming from your throw out bearing mate, the bearing that engages the pressure plate of your clutch, many vehicles make the noise, I have seen vehicles with a knew clutch put in and it still makes the noise, id doesnt effect the performance and is too big a problem to worry about.

Why the faucet makes a wheezing sound when the water is running?

Usually any noise from plumbing is caused by air trapped in the system

What can be done to reduce the noise coming from the steering column of a 1995 Ford Windstar when turning?

i have heard that noise and I believe it is coming from the body frame connection and i also heard that u can get a kit to eliminate the noise. Ed

Noise coming from engine in Oldsmobile cutlass?

Noise coming from engine in Oldsmobile Cutlass could be as a result of an oil leak in the rear of your engine. This makes the gears to wear off leading to severe knocking noise.

What is the whistling or steam sounding noise coming from behind your bathtub spout and faucets?

One of the supply lines has a hole or the faucet itself. You probably have seen the water by the time you get this. You probably have to shut the whole house off, most tubs don't have their own shut off valves.

Why does a whistling noise come from a shower faucet the faucet to fill the tub the whistling is constant even when off Any ideas on how to fix it and if it going to cause serious problems?

This is probably due to a leak somewhere in the faucet. Alternatively, it could be because some part of the faucet is not completely screwed in all the way. You need to tighten any loose parts on the faucet. If this does not help, you may need to find a professional plumber to help you locate and fix the leak.

Why would the shower drain or bathroom sink faucet make a bubbling noise when you flush the toilet?

Bad vent or particle stoppage

What is Humming noise from Saturn Ion 2007?

where is the humming noise coming from? if it's coming thru the speakers and matches the rev tone of the engine, then you have a bad ground in your stereo.

What is a sound meter and what does it do?

"A sound meter measures the pressure of sounds. It is used in measuring the amount of noise pollution, such as aircraft noise. The sound meter does not measure the amount of sound that humans hear. There is a different type of meter used for this."

There was a weird noise coming from the vents after accidentally holding the ignition for a second There was no noise in the past what do you think is the cause for that noise?

there might be a bubble in your radiator