Kaikukoppa

Kaikukoppa is a Finnish term that translates to "echo box" or "resonator box". It refers to a hollow space within a musical instrument or a sound-producing object designed to amplify and shape the sound produced. In many string instruments, such as guitars, violins, and cellos, the body of the instrument itself functions as a kaikukoppa. The vibrations of the strings are transferred through the bridge to the soundboard, which then resonates within the hollow body. This resonance causes the air inside the body to vibrate, producing a louder and richer sound than would be possible from the strings alone.

The shape, size, and materials used in the construction of a kaikukoppa significantly influence the instrument's tonal characteristics. Different designs can produce brighter, warmer, louder, or more sustained sounds. In some percussion instruments, a resonant cavity might be incorporated to add depth and sustain to the percussive sound. While most commonly associated with musical instruments, the principle of a resonating chamber can be found in various acoustic devices where sound amplification and modification are desired. The term emphasizes the function of the space as a receiver and amplifier of sound.