Sound box

The resonator is a hollow body, usually made of wood or metal, whose task is the gain of sounds or tones. Resonance body are part of many musical instruments.

A resonant cavity is part of an acoustic resonator, usually a cavity with very specific dimensions. He is an oscillatory system whose components are tuned to a set of specific natural frequencies. Once excited, the resonator resonates with a mixture of the frequency ( see also resonance (Physics) )

The smaller the cavity, the higher are the natural frequencies. Therefore, a double bass, is always considerably larger than a violin. In a musical instrument, efforts are made to enable complicated by shaping different possible modes of vibration, so that every note played about the same appears noisy.

Regardless of the form of the resonator oscillates always in the desired frequency, that is the pitch, the aforementioned component (such as a string ), and outputs vibration with amplified to the air. In musical instruments, where you can play multiple pitches, can this natural frequency vary by appropriate modifications (eg by holding a string of a string instrument ), and / or there are several different components with different natural frequencies exist, which are excited when needed (eg, different strings in stringed instruments, various organ pipes, etc.). In this case, the resonator body is constructed so that it has a range of natural frequencies, that ideally cover the entire range of the instrument; then the resonance body vibrates at all producible with the instrument pitches with good.

The sound box is the following musical instruments represents a significant component:

• Stringed instruments such as violin, viola, cello and double bass
• Not aerophonical or electronic keyboard instruments like piano / grand piano, harpsichord ( in the instruments: soundboard )
• In some plucked instruments such as classical guitar, mandolin, banjo, harp
• In some membranophones ( fur Klinger such as timpani)
• Music Sheets ( in some of the human oral cavity is used as a resonance chamber )

Not having a sound box

• Aerophones (generation of the tone alone by the air flow, such as wind instruments, organ ( depends on the pipes, so reed pipes have a sound box ), accordion )
• Electric Phone (Electronic instruments such as synthesizers, electric guitar)

Chance made ​​sound box made ​​of other materials, such as glass in the glass harp and glass harmonica. The ( textile ) funnel of a gramophone has the characteristics of a Membranophons or a Idiophons - but the exciting frequency is specified to the sound body. It can therefore be described as a resonance body.

• Component ( musical instrument )
• Acoustics