Bachelorarbeit, 2014
81 Seiten
Introduction
The Human Voice
1. Steps to Create Voice
2. Timbre, Formants & Loudness
3. Male vs. Female Voice
4. Intelligibility and Directivity behavior of Sound Field around the HumanTalker
Microphones Used for Location Sound
1. Transducer principle, frequency response, polar pattern
2. Fulfill requirements
3. Boom Microphones
4. Lavalier Microphones
5. Planted Microphones
Placing the Microphone
1. Boom Positions and Techniques
2. Lavalier Positions and Techniques
3. Planted Positions and Microphones Techniques
4. Sound Improvement
Field Tests
1. Test #1
2. Test #2
3. Test #3
4. Test #4
5. Test #5
Creating the Film Sound Application
1. Elements
2. Using the Elements
3. The Application as a whole
Conclusion
This thesis aims to develop an interactive online tool for the company Schoeps to inform production sound mixers about microphone selection and placement for professional dialogue recording on location, while demonstrating these technical aspects through practical field tests and a custom-built HTML5 video application.
1. Steps to Create Voice
The human voice originates in the larynx. It contains cartilages and ribbons, but is mostly hollow on the inside. Only the vocal folds are located there. These are elastic ribbons about 15 – 20mm in length. While the talent is breathing, the vocal folds are completely relieved. Now when the talent decides to speak, the vocal muscles force the vocal folds to close. But since air from the lungs pushes against the vocal folds, trying to open the crack (glottis) between them, they begin to oscillate. Depending on length and size, they oscillate at about 120 Hertz (men) or 220 Hertz (women).
This is called the neutral pitch of a voice. The amplitude of the oscillation is at maximum which means that the talent can speak very powerfully and over a long period of time at this pitch. All regular speech is nearby this frequency and definitely in the same octave, the lower two-thirds of the whole speech range. Changes in pitch are achieved by straining the muscles in and around the larynx (for higher pitch), or by relieving strain to lower the pitch.
The glottis produces the fundamental frequency at roundabout 100 Hz (200 Hz respectively) and many more harmonics at 200Hz, 300Hz, 400Hz etc.
Introduction: Provides the context of location sound recording and explains the motivation for creating an interactive, educational web tool for the manufacturer Schoeps.
The Human Voice: Explores the physical nature of the voice, including its generation, timbre, differences between genders, and the directivity of the sound field.
Microphones Used for Location Sound: Details the transducer principles and operational characteristics of microphones, focusing on their specific roles in dialogue capture.
Placing the Microphone: Discusses the critical role of positioning, examining boom, lavalier, and planted techniques along with methods for sound improvement.
Field Tests: Presents the results of five practical experiments conducted to compare microphone performance and directivity under various location conditions.
Creating the Film Sound Application: Documents the development of an HTML5-based web application that synchronizes video with multiple audio tracks to demonstrate recording techniques.
Conclusion: Synthesizes the core principles of professional dialogue recording and highlights the long-term potential of the developed digital application.
Production Sound, Dialogue Recording, Schoeps, Microphone Placement, Human Voice, Transducer Principle, Boom Microphone, Lavalier Microphone, Planted Microphone, HTML5, Web Application, Field Tests, Sound Perspective, Speech Intelligibility, Directivity.
The work focuses on creating an educational, interactive web tool that helps production sound mixers understand microphone selection and placement for filming.
The research spans from the physics of the human voice and technical microphone characteristics to practical on-set placement strategies and the technical implementation of an HTML5-based demonstration platform.
The primary goal is to provide international customers with an interactive, demonstrative way to learn about the complexities, specifications, and practical applications of microphones used in film production.
The thesis combines theoretical analysis of acoustics and microphone physics with a series of controlled field tests to generate empirical data on microphone performance.
The main body treats the physical properties of the voice, the technical specifications of microphones, standard placement techniques (boom, lavalier, planted), and the technical development of a browser-based multi-track audio/video player.
Key terms include Production Sound, Dialogue Recording, Microphone Placement, HTML5, and Directivity.
Lavaliers are often hidden under clothing, which can cause muffling, contact noise, and an unnatural, dry sound perspective due to their proximity to the mouth.
The author developed a custom solution (Solution #4) that merges all audio tracks into one MP4 container and uses custom Javascript controls to overwrite the standard browser player for smooth, in-sync switching.
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