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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. A

    Sound advice required

    Hi all, I am a 29 year old Civil Engineer and at the moment I will more than likely be made redundant in August. Due to the shortage of engineering work I am looking to re-train as a plumber with a view to working for myself (eventually). I've spent ages looking round the internet for home...
  2. C

    Pressure sound in mains pipes - why?

    Hi all am a bit mystified by a background water pressure sound in my mains pipes. A callout service suggested I had a leak under my kitchen floor so I had the kitchen ripped out, tiles up, hole dug in the concrete, but nothing found. As there are no leaks anywhere else (the two cold tanks in the...
    • ChrissyWissy
    • Thread
    • cold concrete damage kitchen leak mains no water noise pipe pipes pressure problem sound stopcock tap test tiles valve water water pressure
    • Replies: 8
    • Forum: Plumbing Jobs | The Job-board
  3. P

    'Water Hammer' wav (sound) file examples?

    Hi, does anyone have any recording or wav files of 'water hammer'? My problem (in my council) flat is the sound of a rasping, vibrating, low whining/screeching/groaning 'Tuba' that lasts for up to 2 seconds. It is horrible and keeps me awake night after night. At first I thought it was the...
    • parisblue
    • Thread
    • banging brass cistern difficult hammer high mains mobile noise pipe pressure problem sink sound tap taps tee valve wall water water hammer web website
    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
  4. L

    Low humming sound

    Our central heating boiler is situated on a short, non load bearing spur wall within the downstairs bathroom extension. This spur leads from an outside wall. There are no other rooms above or next to this wall Until recently no problem, but now we have a humming / vibrating sound throughout the...
    • longsword
    • Thread
    • bathroom boiler central central heating system fan gas humming new boiler problem pump radiators sound valve wall
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  5. J

    Fog horn/groaning sound in pipes since irrigation put in

    Until we has an irrigation system installed in September, we never had any disturbing sounds from our plumbing in the house we've lived in for 11 years. Since we put in the irrigation we get a periodic groaning sound from the pipes -- it sounds like a fog horn; loud and continuous (not pulsing)...
    • JonLondon
    • Thread
    • check valve copper flow flush hammer high inside london no water noise pipe pipes plumbing pressure put since sound tap taps travel valve valves vibration wall water work
    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
  6. M

    Apollo Boiler keeps cutting out and making banging sound : ( Please Help I’m all cold

    Hi all, Am hoping someone can give me some advice on what i can do / diagnose my problem i am having with my Apollo 15/30B wall mounted Gas boiler. I have recently moved into my 1st house and been here for about 2 months. As its starting to get allot colder i decided to switch on the heating...
    • Mavmbuk
    • Thread
    • apollo banging boiler central central heating system cheap circulation cistern cold cutting cutting out expansion free gas hammer help keeps kettling loft making noise oil overheat please pump school sound supply valve water
    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  7. R

    If you could please offer me some sound honest advice...

    If I could get some good intelligent advice believe me I'd be bloody greatfull! Basically I've been studying business at college and just feel like I've wasted three years (im 19 now) I really wished I learnt a trade instead. I am very interested in plumbing but I dont have a clue where to...
    • Real Magic
    • Thread
    • advice apprenticeship building could eco fitting honest industry job jobs offer please plumber plumbers plumbing sound toilet trade trainee waste water work
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  8. T

    Toilet Sound

    Hi, I recently had a new toilet installed but each time my neighbour below (I live in the top flat of a converted house) flushes their toilet noises that sound like a ship sounding its horn come out from my toilet, and sometimes it is very loud. Has anyone experienced this problem before?
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