SOUND-PRODUCING DEVICES

**Definition:** This place covers:

Devices that produce a sound by striking a resonating body, such as bells, chimes, gong.

Whistles, siren devices that produce a sound driven by rotating member, motor, or fluids, e.g., compressed gas.

Devices that produce a sound by vibrating a diaphragm or analogous element, such as foghorns, vehicle hooter, buzzer.

Methods or devices that transmit, conduct, or direct a sound wave.

Methods or devices for protection against, or damping of, acoustic waves.

Cones, diaphragms, or the like, for emitting or receiving sound.

Acoustics not otherwise provided for.

Arrangements for generating mechanical vibrations in fluids.

The production of sounds which may not be audible to human beings but which are audible to animals.

**Glossary:** - Acoustics; Sound: The terms acoustics and sound cover the technical fields dealing with mechanical vibrations at all infrasonic, sonic, and ultrasonic frequencies. However, generation or transmission of mechanical waves, in general, is covered by subclass B06B , subject to the exception specified in special rules of classification within this subclass mentioned above. - Musical instrument: Musical instrument can include a device that emits a single sound signal or, in other words, does not exclude a device that emits a single sound signal.