Phonetics (from the Greek: φωνή, phōnē, "sound, voice") is a branch of linguistics that comprises the study of the sounds of human speech, or—in the case of sign languages—the equivalent aspects of sign. It is concerned with the physical properties of speech sounds or signs (phones): their physiological production, acoustic properties, auditory perception, and neurophysiological status. Phonology, on the other hand, is concerned with the abstract, grammatical characterization of systems of sounds or signs.

The field of phonetics is a multiple layered subject of linguistics that focuses on speech. In the case of oral languages there are three basic areas of study:

These areas are inter-connected through the common mechanism of sound, such as wavelength (pitch), amplitude, and harmonics.

Phonetics was studied as early as 500 BC in ancient India, with Pāṇini's account of the place and manner of articulation of consonants in his 5th century BC treatise on Sanskrit. The major Indic alphabets today order their consonants according to Pāṇini's classification. The Ancient Greeks are credited as the first to base a writing system on a phonetic alphabet. Modern phonetics began with Alexander Melville Bell, whose Visible Speech (1867) introduced a system of precise notation for writing down speech sounds.

Victor Borge ( /ˈbɔrɡə/ BOR-gə; 3 January 1909 – 23 December 2000), born Børge Rosenbaum, was a Danish and American comedian, conductor and pianist, affectionately known as The Clown Prince of Denmark,The Unmelancholy Dane, and The Great Dane.

Borge was born Børge Rosenbaum in Copenhagen, Denmark, into a Jewish family. His parents, Bernhard and Frederikke Rosenbaum, were both musicians—his father a violist in the Royal Danish Orchestra and his mother a pianist. Like his mother, Borge began piano lessons at the age of two, and it was soon apparent that he was a prodigy. He gave his first piano recital when he was eight years old, and in 1918 was awarded a full scholarship at the Royal Danish Academy of Music, studying under Olivo Krause. Later on, he was taught by Victor Schiøler, Liszt's student Frederic Lamond, and Busoni's pupil Egon Petri.

Borge played his first major concert in 1926 at the Danish concert-hall Odd Fellow Palæet (The Odd Fellow's Lodge building). After a few years as a classical concert pianist, he started his now famous "stand up" act, with the signature blend of piano music and jokes. He married American Elsie Chilton in 1933, the same year he debuted with his revue acts. Borge started touring extensively in Europe, where he began telling anti-Nazi jokes.

Dean Martin (born Dino Paul Crocetti; June 7, 1917 – December 25, 1995) was an American singer, film actor, television star and comedian. Martin's hit singles included "Memories Are Made of This", "That's Amore", "Everybody Loves Somebody", "You're Nobody till Somebody Loves You", "Sway", "Volare" and "Ain't That a Kick in the Head?". Nicknamed the "King of Cool", he was one of the members of the "Rat Pack" and a major star in four areas of show business: concert stage/night clubs, recordings, motion pictures, and television.

Martin was born in Steubenville, Ohio, to Italian parents, Gaetano and Angela Crocetti (née Barra). His father was from Montesilvano, Pescara, Abruzzo, Italy, and his mother was an Italian of part Neapolitan and part Sicilian ancestry. Martin was the younger of two sons. His brother was named Bill. Martin spoke only Italian until he started school. He attended Grant Elementary School in Steubenville, and took up the drums as a hobby as a teenager. He was the target of much ridicule for his broken English and ultimately dropped out of Steubenville High School in the 10th grade because he thought that he was smarter than his teachers. He delivered bootleg liquor, served as a speakeasy croupier, was a blackjack dealer, worked in a steel mill and boxed as welterweight. He grew up a neighbor to Jimmy the Greek.