Drum in the context of "Percussion mallet"

In physics, sound is a vibration that propagates as an acoustic wave through a transmission medium such as a gas, liquid or solid.In human physiology and psychology, sound is the reception of such waves and their perception by the brain. Only acoustic waves that have frequencies lying between about 20 Hz and 20 kHz, the audio frequency range, elicit an auditory percept in humans. In air at atmospheric pressure, these represent sound waves with wavelengths of 17 meters (56 ft) to 1.7 centimeters (0.67 in). Sound waves above 20 kHz are known as ultrasound and are not audible to humans. Sound waves below 20 Hz are known as infrasound. Different animal species have varying hearing ranges, allowing some to even hear ultrasounds.

A musical instrument is a device created or adapted to make musical sounds. In principle, any object that produces sound can be considered a musical instrument—it is through purpose that the object becomes a musical instrument. A person who plays a musical instrument is known as an instrumentalist.

The history of musical instruments dates to the beginnings of human culture. Early musical instruments may have been used for rituals, such as a horn to signal success on the hunt, or a drum in a religious ceremony. Cultures eventually developed composition and performance of melodies for entertainment. Musical instruments evolved in step with changing applications and technologies.

A music box (American English) or musical box (British English) is an automatic musical instrument in a box that produces musical notes by using a set of pins placed on a revolving cylinder or disc to pluck the tuned teeth (or lamellae) of a steel comb. The popular device best known today as a "music box" developed from musical snuff boxes of the 18th century and were originally called carillons à musique (French for "chimes of music"). Some of the more complex boxes also contain a tiny drum and/or bells in addition to the metal comb.

Entheogens are psychoactive substances used in spiritual, religious, recreational, therapeutic, and experimental contexts to induce altered states of consciousness. While the term itself emphasizes ritual and sacred applications, the same substances are also frequently employed recreationally—sometimes in ways that diverge from or disregard traditional protocols. Hallucinogens such as the psilocybin found in so-called "magic" mushrooms have been used in sacred contexts since ancient times. Derived from a term meaning "generating the divine from within", entheogens are, in religious and shamanic contexts, intentionally employed in the attempt to facilitate experiences of transcendence, healing, divination, and mystical insight.

Entheogens have been used in religious rituals in the belief they aid personal spiritual development. Anthropological study has established that entheogens are used for religious, magical, shamanic, or spiritual purposes in many parts of the world. Civilizations such as the Maya and Aztecs used psilocybin mushrooms, peyote, and morning glory seeds in ceremonies meant to connect with deities and perform healing. They have traditionally been used to supplement diverse practices, such as transcendence, including healing, divination, meditation, yoga, sensory deprivation, asceticism, prayer, trance, rituals, chanting, imitation of sounds, hymns like peyote songs, drumming, and ecstatic dance.

The timpani (/ˈtɪmpəni/; Italian pronunciation: [ˈtimpani]) or kettledrums (also informally called timps) are musical instruments in the percussion family. A type of drum categorised as a hemispherical drum, they consist of a membrane called a head stretched over a large bowl traditionally made of copper. Thus timpani are an example of kettledrums, also known as vessel drums and semispherical drums, whose body is similar to a section of a sphere whose cut conforms the head. Most modern timpani are pedal timpani and can be tuned quickly and accurately to specific pitches by skilled players through the use of a movable foot-pedal. They are played by striking the head with a specialized beater called a timpani stick or timpani mallet. Timpani evolved from military drums to become a staple of the classical orchestra by the last third of the 18th century. Today, they are used in many types of ensembles, including concert bands, marching bands, orchestras, and even in some rock bands.

Timpani is an Italian plural, the singular of which is timpano, though the singular may also be referred to as a timpanum. In English the term timpano is only widely in use by practitioners: a single drum is often referred to as a timpani, leading many to incorrectly pluralize the word as timpanis. A musician who plays timpani is a timpanist.

Ecstatic dance is a form of dance in which the dancers, sometimes without the need to follow specific steps, release themselves to the rhythm and move freely as the music takes them, leading to trance and a feeling of ecstasy. The effects of ecstatic dance begin with ecstasy itself, which may be experienced in differing degrees. Dancers are described as feeling connected to others, and to their own emotions. The dance serves as a form of meditation, helping people to cope with stress and to attain serenity.

In the ancient and widespread practice of shamanism, ecstatic dance and rhythmic drumming are used to alter consciousness in spiritual practices. Ecstatic sacred dances are known also from religious traditions around the world. Modern ecstatic dance was revived by Gabrielle Roth in the 1970s and formalised in her 5Rhythms practice; it is now found in variants across the western world. Attitudes to ecstatic dance have varied widely. In the 1920s, musicologists such as Paul Nettl and Fritz Böhme considered it primitive and unrefined. More recently, it has been compared to dancing in raves and in club culture, the anthropologist Michael J. Winkelman and the musicologist Rupert Till finding in these forms elements of ritual, spirituality, and healing. The philosopher Gediminas Karoblis relates early ecstatic dance to religious ritual, and notes that all well-executed dance borders on ecstasy.