sound

In physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid.
In human physiology and psychology, sound is the reception of such waves and their perception by the brain. Only acoustic waves that have frequencies lying between about 20 Hz and 20 kHz, the audio frequency range, elicit an auditory percept in humans. In air at atmospheric pressure, these represent sound waves with wavelengths of 17 meters (56 ft) to 1.7 centimetres (0.67 in). Sound waves above 20 kHz are known as ultrasound and are not audible to humans. Sound waves below 20 Hz are known as infrasound. Different animal species have varying hearing ranges.

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  1. L

    Potterton Performa 28 combi boiler whistling sound

    Hello, could someone possibly advise me on a hot water problem with my Potterton Performa 28 combi boiler. When any hot water tap is turned off there is a whistling sound from the boiler. So far I have failed to identify what is producing this sound but it still happens even if I switch off...
  2. W

    Clicking/Dripping sound near the radiator

    Hi, When i turn on my radiator ... i hear some clicking and dripping sound under the floor near my radiator ... sounds like it's coming from the pipes. Sometimes it becomes loud banging sound after a few hours ... and sometimes it turns perfectly quiet. I have bled the radiator and...
  3. N

    Roca boat valve

    Hi -Over the holiday had to replace boat valve on roca push button cistern, no shops open so used a bottom entry torbeck valve I had. Customer says whistling sound happens (not on every flush) Any ideas? or I will wait till suppliers are open and replace like for like. Happy New Year Nick
  4. M

    What sound system do you have in your van?

    Hi guys, i am looking to buy a cd player in my van and am wondering if you guys know of any decent ones? My van is a vauxhall vivaro 2006 model. Am thinking, that maybe one with a sat nav integrated. Do any of you chaps have one of these? Or is it a no no. To be honest, i am not sure what kind...
  5. T

    biasi

    Hi, My gran has a biasi 28kw combi boiler about 2008 model, when i open the hot water tap there is a strange rumbling/screaching noise, when i put my hand on the pump it feels like it is coming from there but i didn't think that the pump should run on hot water demand?, i thought hot water side...
  6. N

    Danfoss 3 way valve making buzzing sound

    Hope someone can offer me advice about this problem. The valve is buzzing when the heating and hot water are not on via the timer but the system is still powered up via the main fuse. I have taken the valve motor off and and watched it motor over when the ho****er thermostat is switched on and...
  7. W

    Unexplained sound of water

    Changing a ball-valve earlier today. While in loft could hear water running - sounded quite near - and I could hear it sort of through the tank (i.e. it wasn't running out of tank, the water level remained static and the tank was isolated and no taps were on - but the sound seemed to be almost...
  8. M

    Gurgling sound from flue and boiler

    I have an ideal Icos HE 15 boiler. Today heard gurgling noise from flue in garden. Also had water noises in boiler. This then turned into the boiler vibrating noisily so needed switching off. After reading the installation manual thought I'd have a go at fixing it. Opened up the condensate...
  9. C

    Does this sound like the pump?? Pulling my hair out!!

    Hi. Been having problems with CH since last year. I will try to cover as much info as I can in the hope one of you experienced guys might advise on the issue. I have 11 rads all but one fitted with TRV's. Ideal classic slimline ff250 (fitted in the garage) Cold water tank with CH header tank...
  10. R

    Radios

    Anyone got any good recommendations for a decent radio? Ideally I'd like one that can run off batteries as well as mains and the ability to plug in an MP3 player. My budget is around £70 so I was looking at the hitachi site radio. Cheers Pete
  11. A

    Rushing water sound in pipes

    Totally baffled by rushing water sound that can be heard throughout the house but particularly in the kitchen and bathroom (which is immediately above the kitchen). With the stopcock turned off, the sound diminishes but doesn't totally go away despite the fact that the water is totally off at...
  12. K

    rumbling in my pipes. No popping.

    Howdy. I have a new problem that has recently begun. When I use my hot water, i get a rumbling sound for a few seconds and then it stops. Only when I use the hot water. I don't know if it's coincidental or not, but it seemed to start not long after i had a new hot water heater (gas)...
  13. O

    does this sound like a reasonable deal?

    Hey guys. after months and months of searching i finally bought a van, i think i got it for a reasonable price but was wondering what you guys think. its a 2003 ford transit 280 swb with 105k miles, i got it for £2k cash and a part ex on my vauxhall combo 1.7di with 102k miles the new (to...
  14. T

    Air in the CH/HW pipesystem?

    Hi, We have a weird situation with our HW/CH system. When there's a demand for either of them, the boiler tries to switch on, I see the green light (firing the gas) switching on for approx 10 sec, then switches off. At the moment, we have the controller in the following position: - HW always on...
  15. P

    Mates Rates hourly?

    Im a plumber and work mainly on commercial sites, A sparky from work wants some plumbing doing bath room suite(not straight swap )and other bits to downstairs wc and basin, got to move a fair bit of pipework all round. I said id do it on an hourly rate as its a bit hard to price for me anyway...
  16. N

    Baxi solo 2. sort of vibration sound

    Hello everyone, When the boiler goes off (when room up to temp) there is a sound like a loud-ish vibration. It lasts for about 30 seconds or so before going quiet. I can also hear it in the airing cupboard but not sure if it comes from there (the pump) or not. the boiler is working fine, rads...
  17. B

    desperately need sound advice on pumped shower!

    i am having a new bathroom fitted and have had contrary advice re the performance of a pumped shower. concrete floor in the bathroom means that cant run a pipe through from the boiler so can anyone advise on the best pumped shower to use or worth getting into the work involved to work through...
  18. T

    Plumbing Material Costs

    I need some help please. We are having a bathroom and a wc fitted out. The plumbers are on a day rate plus reimbursement for plumbing sundries. The bill for sundries comes to £1200. We have had 2 toilets fitted (one toilet had a new soil vent, the other didnt), a free standing bath and free...
  19. L

    Does this sound right?

    Hi I was wondering if somebody could advise me if this is possible. I have the old style back boiler in my house and a local plumber was due to come today to take the system out and replace it with a combi boiler. He is also going to move the gas pipe I'n the kitchen as were having a new...
  20. O

    Loud banging sound on start up

    Hello all, This is my first post. I really need some advice please. I have a Potterton Promax HE Plus, which is not under warranty anymore. I have had a number of problems with it and had to call the heatteam out at least 4 times to fix things on it. It has been ok for about a year. Now, there...

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