Concert halls acoustic design

Concert halls acoustic designDefinition Concert hallsMaterials usedConcert hallAconcert hallis a place whereconcertsofclassical musictake place. Concert hall can either mean the actual room where the concerts takes place, or the whole building.

Concert hallA concert hall is usually a big hall: big enough for anorchestra to be on the stage. A small concert hall, designed for just a few performers (as inchamber music) may be called a recital hall.

Concert halls

Boston Symphony Hall, US

Bridgewater Hall, Manchester, UK

Grosser Musikvereinssaal, Vienna, Austria

Philharmonie de Paris, France

Sala So Paulo, Brazil10

The Sibelius Hall, Lahti, Finland

Tokyo Opera City Concert Hall, JapanIn some ways, even the largest hall is no difference from the smaller rooms, the basic acoustic criteria are the same.

Must have a low ambient noise level from internal and external sourcesProvide a reasonable level of acoustic gainProvide appropriate reverberation timeAvoid artefacts such as echoesArchitectural considerations Hearing conditions in any auditorium are considerably affected by purely architectural considerations like:ShapeDimensionVolumeLayout of boundary surfacesSeating arrangementsAudience capacity

Room shapeThe talker-to-audience distance can be minimized by carefully considering the room geometry.

A rectangular shoebox-type hall, with the stage cross one narrow end may be excellent for music where an audience can be seated farther away and a greater ratio of reverberated sound is desirableMaterials usedBarrel Shaped Diffuser

Diffusors (or diffusers) are used to treat sound aberrations in rooms such as echoes. They are an excellent alternative or complement to sound absorption because they do not remove sound energy, but can be used to effectively reduce distinct echoes and reflections while still leaving a live sounding space.

Perforated metal

Perforated metal(also known, depending on thickness, as perforated sheet, perforated plate, stamping plates, or perforated screen) is made through themetal stampingandsheet metalmanufacturing process.

Ceiling ofCulture Palace (Tel Aviv) concert hall is covered with perforated metal panelsPerforated materials have many advantages ranging from weight reduction through acoustic noise reduction to heat dissipation and much much morehard acoustical finishes and furnitures Plaster plaster is a traditional material for ceilings and walls in concert halls.

-- to enhance reverberation and give a sense of sound envelopment, the side walls and sometimes the ceiling are often shaped to scatter sounds. Plaster is often used to create these shapeshard acoustical finishes and furnitures Gypsum board. Gypsum board is seldom used un concert hall designs because it has too much low frequency absorption. hard acoustical finishes and furnitures Wood and wood paneling.

Wood, often used in concert hall design for aesthetic reasons, must be installed with care. Thin wood paneling with air space behind will allow frequency absorption through panel vibration. hard acoustical finishes and furnitures Glass

Glass is seldome used in concert halls, since these rooms are usually internal spaces surrounded by public hallways and functional spaces.

Glass might be used for decorative design and lighting.soft acoustical finishes and furnitures Seating

Seating absorption should match the absorption of people so that when people ae absent, as in rehearsal and low attendance, there will not be a noticeable change in the reverberation times of the hall.hard acoustical finishes and furnitures CarpetsCarpet is usually limited by acoustics to aisle runners.hard acoustical finishes and furnitures Walls and balcony faces.

Where rear walls follow the seating curve there is the real possibility of reflections back to the front of the room