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Need to reduce the loudness of a grand piano.

  • 1.  Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 09-30-2016 12:52

    I have a customer who wants their grand piano to be much quieter. They like the idea of attaching some kind of cloth or other material to the underside of the rim to block the sound. 

    Does anyone know of a material that would be effective this way?

    Mark Krag

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    Mark Krag
    Campbell CA
    408-371-7181
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  • 2.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 09-30-2016 12:57
    Hi Mark,
    Acoustic foam is an option for this. There are several suppliers on the interweb.

    All the best,
    Jon Ralinovsky





  • 3.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 09-30-2016 13:51
    Jon,
    Keep in mind that any cloth, especially foam, will cut down the high end partials and perception of attack.
    Roger



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  • 4.  RE: Need to reduce the loudness of a grand piano.

    Member
    Posted 09-30-2016 16:55

     Before doing anything on the piano I would look at the room acoustics first. How big is the piano and is the room "live" meaning does it have high ceilings, lots of tile and windows or hard floors. The presence or absence of furniture can affect the volume. Often a round rug with a foam pad can be put on the floor under the piano to reduce sound reflection. Acoustic foam could be used under the soundboard but it might be better to consider some drapery, rugs, stuffed furniture or even some acoustic wall panels. Changing the position of the piano in the room could also affect the volume. Playing with the lid down can also be an option

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    James Kelly
    Pawleys Island SC
    843-325-4357



  • 5.  RE: Need to reduce the loudness of a grand piano.

    Posted 09-30-2016 17:10
    This wouldn't happen to be a player, would it?
    Ron N




  • 6.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 09-30-2016 17:47
    A client of mine cut some felt to fit over the speaking length of the strings. It worked for him, but of course there's not much sustain. Sound absorbing foam cut to fit between the beams under the piano will reduce volume about 10-15%. A 4X8 sheet is probably $150. You can get multi layer sound proof vinyl, and blanket the bottom of the piano for a larger reduction. This stuff isn't cheap, but it's used in engine compartments to muffle noise. About an inch thick. No, I haven't used it on a piano, but I have used it to line the doghouse engine cover for my RV. Pricy, but it works well.
    Good luck.
    Paul McCloud
    SAN Diego




  • 7.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 09-30-2016 18:02
    I've heard that internal blankets are available, although I don't know who makes them.  They have the added benefit of keeping the plate/soundboard dust free. I'm not a big fan of baffles. And what about just voicing the piano down a bit?  

    Unless, as Ron Nossaman suggests, the client has a player and only wants background "noise." Often players are so out of regulation they won't play softly, so there's a good job to get--a full regulation. Player pianos are less forgiving and need regulation every 5 years or so. Modern players are a good source for work even if knowledge of the electronics is limited. The acoustic mechanism still needs attention.

    Richard West







  • 8.  RE: Need to reduce the loudness of a grand piano.

    Posted 09-30-2016 19:14

    Is it the overall volume or the attack? I have used foam block purchased at fabric stores to place between the beams with success. Sometimes with no foam under the top treble section. When that wasn't enough, I placed something under the music rack to extend beyond the rack 1.5' or so.; this cuts down on action noise and the attack impact. Carpet remnants, corregated cardboard or foam poster panel.

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    Regards,

    Jon Page



  • 9.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 10-01-2016 14:17

    Thanks for all the ideas. 

    I should have mentioned that the piano is in an airport lobby. It is in a large room with hard uncovered floors, large windows without curtains and only a little furniture. It is not a player. The complaint is that people play it hard and it is too loud in general. 

    Mark Krag

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    Mark Krag
    Campbell CA
    408-371-7181



  • 10.  RE: Need to reduce the loudness of a grand piano.

    Posted 10-01-2016 16:44

    ........well yeh that would have been good info. to have, in which case drape a wet cloth over the  hammers and with a hammer iron or regular iron  on medium heat have at it ......that'll make it real quiet........

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    Martin Snow
    Boston MA
    617-543-1030



  • 11.  RE: Need to reduce the loudness of a grand piano.

    Posted 10-01-2016 17:08
    I'll never understand why people insist on putting a piano in an
    environment and situation it has no business being put in, and expect
    someone to make it do something it can't possibly do in the situation.

    Yea, that information would have taken care of the question quickly.
    Ron N




  • 12.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 10-01-2016 17:45

    If the complaint is that the piano player is playing too loud then the obvious solution is to tell the player to play softer. No amount of sound reducing material is going to solve the problem, because the piano player will just play louder to compensate for the lack of sound. Management needs to let the player know he/she needs to play softer. It's not your problem.

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    Willem "Wim" Blees, RPT
    Mililani, HI 96789



  • 13.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 10-01-2016 19:56
    Wim,
    We all know the airport management can't get the pianist to play softer. Have you ever tried to get a schoolyard of children to play softer. It doesn't compute. The management should shove an electric piano under the player hands. That will fix the problem immediately. Only, when those young pianists grow up, we'll we give them a real piano.

    Roger





  • 14.  RE: Need to reduce the loudness of a grand piano.

    Posted 10-01-2016 22:02

    Creative use of strip mutes.

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    Ed Sutton
    ed440@me.com
    (980) 254-7413



  • 15.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 10-02-2016 04:31
    I would also try and get them to purchase 2-3 items that I would think might make them pleased to have.

    1. A string cover, which in addition to taking the edge off the volume will also cut down on dirt and all kinds of dust I imagine would happen in an environment like that.
    2. A player system, especially one that can be controlled via wifi (like PianoDisc) If they don't want someone playing loudly, why not have the piano play itself softly in the background?
    3. I have seen the subtle installation of museum rope work wonders as to how people approach a piano. I suspect this may also help protect the case.

    Good luck!
    Elizabeth




  • 16.  RE: Need to reduce the loudness of a grand piano.

    Member
    Posted 10-02-2016 11:32

    Good luck with that. I have seen grand pianos in airport lobbies which are like the middle of shopping malls. With all of the live surfaces and cavern like space it will be almost impossible to get the piano quiet. The player is competing with crowd noise, constant pa announcements, sound wave physics, glass and floor reflection . Even a player system will have a hard time in this extreme setting. If the airport wants a nice piano lounge they should spend the money to construct one off to the side where they can customize a set. On the other hand if they want to destroy the piano just leave it there and let people pound away.

    BTW a string cover will not reduce the sound level by any significant amount. I would not attempt to voice the piano down either. You start needling hammers and players will just play harder. You could try some floor type acoustical pianos or tell management to have an acoustical engineer come to study the problem but I would just segue out of the picture. You are shovelling snow in a blizzard

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    James Kelly
    Pawleys Island SC
    843-325-4357



  • 17.  RE: Need to reduce the loudness of a grand piano.

    Member
    Posted 10-02-2016 11:34

    I meant acoustical floor panels/baffles not pianos

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    James Kelly
    Pawleys Island SC
    843-325-4357



  • 18.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 10-02-2016 13:25

    I am unexperienced in these matters, but would like to hear if anyone has tried taking this direction with such a situation: Perhaps the core of the problem is that the players cannot hear themselves adequately?  If that's the case it would be pretty difficult for them to discipline themselves to play more quietly, no matter how much they did or did not want to please the airport management (if they're being paid, surely they do??).  In which case perhaps the best solution is to look for ways of reflecting more of the sound back at them.  Granted, that kind of job would be better handled by an acoustical engineer than a piano technician, but maybe someone knows of a relatively easy spot to mount a sheet of plexiglass that might help?

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    Nathan Monteleone
    Fort Worth TX
    817-675-9494
    nbmont@gmail.com



  • 19.  RE: Need to reduce the loudness of a grand piano.

    Posted 10-02-2016 14:49
    As totally ridiculous (and common) as this situation is, this is one of
    the better ideas I've heard. In lieu of anything like good sense from
    the people who insist on putting pianos in these places, putting the
    piano in a plexiglass drummer pen sounds like the potentially best
    option. The pain threshold from the closely surrounding reflective
    surfaces will (might) keep the pianist from pounding harder, and
    considerable floor level sound will be directed upward rather than out.
    It will also discourage passing string fondlers and drink spillers
    somewhat. Most people won't squeeze into what looks like a barrier in
    plain sight. Kids, yes, but nothing works with them.
    Ron N




  • 20.  RE: Need to reduce the loudness of a grand piano.

    Posted 10-02-2016 15:15

    The point of the foam is that it is for sound rooms so it is also designed to be as acoustically neutral across the spectrum as one could get. Does not quite play out like that. A bit muffled if I recall, but with the opening at the top front you get a bit more attack than normal. Better have clean terminations.   Really critical in an airport...

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    R. Scott Kuhn
    Huntsville TX
    713-876-4205



  • 21.  RE: Need to reduce the loudness of a grand piano.

    Posted 10-02-2016 13:55

    I have done what Jon Page suggested but used Sonex foam. I think it was "Sonex one". Expensive option, but as good as you will get if they will pay. Make cardboard patterns between struts. Even a big cut piece over strings if they really want it quiet.

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    R. Scott Kuhn
    Huntsville TX
    713-876-4205



  • 22.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 10-02-2016 14:23

    If the piano has already been well played in, an effective, quick and cheap solution would be to insert something like a loose plastic keytop between the action and the shift stop block.  This is the equivalent of playing with the shift pedal engaged, moving all the hammers over to an unused part of the hammer surface.  It's not a lasting cure, but it will buy some time and it doesn't sound as though the pianist is going to miss the use of his soft pedal.  You don't even have to pull the action.  

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    Cecil Snyder
    Torrance CA
    310-542-7108



  • 23.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 10-03-2016 03:33

    I have a teaching studio with a small grand in a small office/teaching room.  The piano has foam under the sound board, blankets under the lid, towels over the desk area and has been voiced down.  I have to admit it is still loud.

    Sometimes the room is too loud for anything.

    You also have to remember that corner reflections amplify the apparent sound to the player and not necessarily to any audience.

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    Blaine Hebert
    Duarte CA
    626-795-5170



  • 24.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 10-03-2016 04:16

    Blaine

    Since it's a small room, instead of trying to muffle the sound at the source, muffle the sound in the room. Put a thick carpet on the floor, hang carpets and/or curtains on the walls, and even soundproof panels on the ceiling,

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    Willem "Wim" Blees, RPT
    Mililani, HI 96789



  • 25.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 10-04-2016 01:37
    William,

    Not my problem!

    Blaine Hebert




  • 26.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 10-04-2016 04:23

    Blaine

    Then why did you post the problem?

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    Willem "Wim" Blees, RPT
    Mililani, HI 96789



  • 27.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 10-05-2016 00:51

    Wlm,

    If foam under the piano, blankets over the strings, towels over the action and heavy needling didn't do the trick then the problem is that they have too much piano in too small a room.  Nothing will fix that.

    MyPTG.org has enough things to debate.

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    Blaine Hebert
    Duarte CA
    626-795-5170



  • 28.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 10-06-2016 01:41

    It wasn't a problem I needed to fix, just an FYI comment.

    Not everything needs to be fixed.

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    Blaine Hebert
    Duarte CA
    626-795-5170



  • 29.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 10-03-2016 09:19

    I'm with Nathan and Ron earlier in this thread. I've been playing surrounded by plexi on several occasions live and in recording studios - not by myself, but with the whole rhythm section cut off from strings and choirs. As a musician, you immediately adjust to the situation and drop the volume.

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    Patrick Wingren
    Jakobstad, Finland
    0035844-5288048



  • 30.  RE: Need to reduce the loudness of a grand piano.

    Registered Piano Technician
    Posted 10-04-2016 09:35
    In addition to the acoustic foam I've seen what looked like backer board for tile attached to the back of a vertical piano in a restaurant.  It's quite dense and fairly easy to cut to fit the contours of the piano's underside.  This along with a  foam "gasket" around the top of the rim where the lid touches and I'm pretty certain you'll have a sizable drop in volume.