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noise

Noise is unwanted sound considered unpleasant, loud or disruptive to hearing. From a physics standpoint, there is no distinction between noise and desired sound, as both are vibrations through a medium, such as air or water. The difference arises when the brain receives and perceives a sound.Acoustic noise is any sound in the acoustic domain, either deliberate (e.g., music or speech) or unintended. In contrast, noise in electronics may not be audible to the human ear and may require instruments for detection.In audio engineering, noise can refer to the unwanted residual electronic noise signal that gives rise to acoustic noise heard as a hiss. This signal noise is commonly measured using A-weighting or ITU-R 468 weighting.In experimental sciences, noise can refer to any random fluctuations of data that hinders perception of a signal.

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  1. G

    Central Heating noise on ignition and when turning off

    Hi, thx in advance if anyone has any ideas I've got a Worcester Bosch combi with Hive thermostat. Whenever the central heating turns on I get a beep like a gameshow buzzer, and then little rumble. Does the same when turning off. Never does this for just hot water. I had British Gas come out a...
  2. selkhadem

    URGENT Gloworm Ultimate 35c - Clicking noise??

    Hi All, Has anyone ever come across this clicking noise before (see video, starts around 16 secs in)? Just bought a new house with this fitted only 2 years ago. Thanks
  3. L

    PRV Multibloc Valve Strange Noise

    Having a problem with a recent installation. Fitted new unvented cylinder and boiler. Everything fine for 6 months Then I get a call from my customer reporting a water hammer issue. I attend site and fit a shock arrestor. 2 days later he phones me back... still doing it. He says when you open a...
  4. duckbert

    Grundfos MQ3-45 - Weird Noise

    I have a Grundfos MQ3-45 feeding my domestic water from a ground level tank (filled from an RO system from the well). The pump is about 4 years old, with normal-heavy household use. Today it started making a bit of an awful noise - see the attached video. I disassembled the hydraulic end of it...
  5. A

    Noise what water off

    How to stop/cure the high pitched noise bathroom sink that stops when water turned on but then starts again shortly ( time varies ) after water has been turned off. Do not know if relevant but I noticed if I turn on the cold water only, there is first a entirely different lower like noise for...
  6. S

    Any idea what this noise is?

    There is a noise coming from my neighbour's house through the party wall. Sounds like a pump of some sort. They have had a new ensuite installed recently and also a pipe from first to ground floor was leaking and they had it repaired. The noise comes and goes every couple of days. When it is on...
  7. P

    Lining old joist notches to prevent expansion noise

    Has anyone tried lining joist notches with a low friction, high temperature resistant material to prevent the bangs when a pipe expands and momentarily sticks on the joist?
  8. P

    hot water grinding noise

    Hello, when our hot water comes on in the morning and evening there is a deep grinding noise which lasts less than 5 minutes and then stops. After that, all is well. We have a combi boiler. Thanks.
  9. Y

    Inexplicable humming (am I going crazy?)

    Hi All! Bought a house recently, and we have been having the most frustrating issue with a very loud humming noise that intermittently comes and goes in our pipework. Have had a plumber around to check the issue to no avail so far, unfortunately. We have an Ideal Logic+ c35 combi boiler. System...
  10. C

    Noise coming from sprinkler valve

    9-21-22 Hi All: I have always appreciated your comments and troubleshooting recommendations. If I may ask for your thoughts on the following: I have and older Orbit WaterMaster valve. Please see attached photo. I have 4 of these valves in the manifold. I have replaced the diaphragm on all 4...
  11. M

    Please help - thundering noise when I open the hot water tap

    Hello I have no experience in this industry. A few years ago our home was completely stripped apart, remodelled and extended. This required new hot and cold water pipes all over the house, a larger boiler, larger tank and so on - see attached. We wanted the water tank to go into the loft but...
  12. A

    Constant hiss type sound coming from beneath toilet

    Hi, we're having an issue with our toilet in which only for the past few weeks a slight hissing sound happens 24/7. It sounds something is running through the pipes although there's no clear signs in the cistern or with the water meter etc. It isn't that loud, but certainly noticeable with no...
  13. M

    Humming noise when hot water tap is on.

    When I turn on my hot water taps anywhere in the house, after about half a minute there is a humming noise all around the house. When I turn on the cold tap, the noise stops. Any ideas what is causing this humming noise?? Thanks Michael.
  14. T

    Humming noise constantly

    A constant ‘hum’ noise has started and I’ve traced it back to the water meter in the street in front of the house. The noise internally can be heard from the stopcock and you can feel a bit of vibration in the pipe work around the stopcock. The dials on the water meter are dead still when there...
  15. brazilianx

    Flow Noise > Can't believe taps should be this noisy!

    Hi. First time poster. I've just had a new bathroom fitted in my loft and am having an issue with noisy taps - modern mono mixer. Not water hammer, but when they are half on they make a noise that I find unacceptable, yet my plumber insists this is just the way it is. However, my other taps...
  16. C

    Heat Towel Rail Switch - Clicking Noise

    Hi there We have a heated towel rail in our bathroom - Heller brand (well the switch is anyway). Was installed about 10 years ago. We have on a timer, comes on in the morning and back again in the afternoon, overall works well. However the Heller Switch / controller has been making a...
  17. J

    Can anyone help to problem solve this noise from hot water system?

    Hot water system making a very high pitched squeal. Very loud when using the bath upstairs, not as loud in the downstairs kitchen but water pressure has dropped. My step dad (not a plumber) has changed the combination valve but no luck. Any suggestions? Thanks! Attached are videos of the noise...
  18. P

    What could be causing a noise in the house like a fog horn?

    Hi, We live in a bungalow. We are awaiting a plumber to check for water hammer but not sure if there are other things that may be causing the noises in our property. There is a booming noise about every 10 seconds followed by an echo. It starts at random times during the day and continues well...
  19. M

    Continuous noise from indirect water cylinder

    I have moved into a house with a Joule Cyclone CY200L indirect cylinder in my loft. Recently it seems to continuously be making a noise, as if it's filling up or heating up, I'm not sure which. The thermostat on the side is set to 55, when I turn it below 50 there is a click and then the noise...
  20. R

    Loud Buzzing Noise From Boiler

    I have an intermitent buzzing noise that is coming from my boiler. The sound is coming from behind the door panel in the vicinity of where the flame occurs. The only other electronics in this area is the gas control valve and the main control panel module. The sounds seems like it may be coming...
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