The human voice consists of sound made by a human being using the vocal folds for talking, singing, laughing, crying, screaming, etc. Its frequency ranges from about 60 to 7000 Hz. The human voice is specifically that part of human sound production in which the vocal folds (vocal cords) are the primary sound source. Generally speaking, the mechanism for generating the human voice can be subdivided into three parts; the lungs, the vocal folds within the larynx, and the articulators. The lung (the pump) must produce adequate airflow and air pressure to vibrate vocal folds (this air pressure is the fuel of the voice). The vocal folds (vocal cords) are a vibrating valve that chops up the airflow from the lungs into audible pulses that form the laryngeal sound source. The muscles of the larynx adjust the length and tension of the vocal folds to ‘fine tune’ pitch and tone. The articulators (the parts of the vocal tract above the larynx consisting of tongue, palate, cheek, lips, etc.) articulate and filter the sound emanating from the larynx and to some degree can interact with the laryngeal airflow to strengthen it or weaken it as a sound source.

Ingrid Bergman (29 August 1915 – 29 August 1982) was a Swedish actress who starred in a variety of European and American films. She won three Academy Awards, two Emmy Awards, and the Tony Award for Best Actress. She is ranked as the fourth greatest female star of American cinema of all time by the American Film Institute. She is best remembered for her roles as Ilsa Lund in Casablanca (1942), a World War II drama co-starring Humphrey Bogart and as Alicia Huberman in Notorious (1946), an Alfred Hitchcock thriller co-starring Cary Grant.

Before becoming a star in American films, she had already been a leading actress in Swedish films. Her first introduction to American audiences came with her starring role in the English remake of Intermezzo in 1939. In America, she brought to the screen a "Nordic freshness and vitality", along with exceptional beauty and intelligence, and according to the St. James Encyclopedia of Popular Culture, she quickly became "the ideal of American womanhood" and one of Hollywood's greatest leading actresses.

James William Dooley (February 8, 1930 – January 8, 2008) was an American football player and coach. He is best remembered for his tenure in both capacities with the National Football League's Chicago Bears.

Dooley, who grew up in Miami, Florida, originally wanted to pursue a career in medicine at Vanderbilt University, but attended the nearby University of Miami when head coach Andy Gustafson agreed to have the school pay his way through medical school. With the Hurricanes, he played on both sides of the ball and put together an outstanding career, winning All-American honors and becoming the first player in school history to have his number retired. Possessing great speed, he capped this era with four interceptions against Clemson University in the Gator Bowl on January 1, 1952, then was drafted in the first round by the Bears.

In his first year in the NFL, Dooley saw little time on offense, but collected five interceptions. In 1953, he became an important part of the team's passing attack with 53 receptions and four touchdowns, showing a flair for faking out defenders while also popularizing the down-and-out pass. After 34 catches and seven touchdowns the following year, Dooley's career took a detour when he missed much of the next two seasons by serving the U.S. Air Force. He joined the team on November 28, 1956, and played in their final three games, helping the team reach the NFL Championship game against the New York Giants.