course: Communication Acoustics
- teaching methods:
- lecture with tutorials
- computer based presentation, black board and chalk
- responsible person:
- Prof. Dr.-Ing. Rainer Martin
- Prof. Dr.-Ing. Rainer Martin (ETIT)
- offered in:
- winter term
dates in winter term
- start: Thursday the 10.10.2019
- lecture Thursdays: from 10:15 to 11.45 o'clock in ID 03/419
- tutorial Thursdays: from 12:15 to 13.45 o'clock in ID 03/401
All statements pertaining to examination modalities (for the summer/winter term of 2020) are given with reservations. Changes due to new requirements from the university will be announced as soon as possible.
Date according to prior agreement with lecturer.
|Form of exam:||oral|
|Registration for exam:||FlexNow|
The students understand the technical principles of communication acoustics including their physical basics. They are able to complete engineering tasks in several areas, such as electroacoustics, speech acoustics, room acoustics and acoustic simulation technology. Since the emphasis is put on the fundamentals, other fields of technical acoustics, such as vehicle acoustics and applications in medical engineering, are also open for those completing the course.
Communication acoustics deals with those aspects of acoustics which are essential for speech and audio communication and links them to applications in the areas of speech transmission, hearing aids, and telecommunications, and mobile communications. Speech and hearing acoustics are the two most important pillars of communication acoustics. The focus of this lecture lies on a broad comprehension of acoustic phenomena which is necessary to master the diverse aspects of acoustic communication thoroughly. Furthermore, the course will treat electroacoustic sound transmitters and receivers. Electroacoustic transducers are based on electromechanical principles. Therefore, it is necessary to deal with electromechanical transducer principles (electrodynamic, electromagnetic and dielectric). However, one also needs to understand the sending and receiving behaviour. In order to do so, those soundwaves which are the most important for common practice, namely plane and spherical waves, are discussed initially. Based on this, effects such as the problematic radiation of low-frequency soundwaves, the acoustic interference and the formation of directivity are examined. Hearing in rooms plays a central role for communication acoustics. Methods of wave theoretical and geometrical room acoustics, which lead to the definition of room parameters that are important in practice (reverberation time, equivalent absorption area, reverberation radius, etc.) and are used to realise virtual auditory environments, are to be discussed. Finally, the lecture provides an introduction to hearing aids and cochlear implants.
Systemtheorie, komplexe Wechselstromrechnung
Die Note setzt sich im Wintersemester aus den Ergebnissen der mündlichen Prüfung und der studienbegleitenden Leistungen zusammen. Genaueres ist den Vorlesungsunterlagen (Moodle) zu entnehmen. Im Fall einer Wiederholung der Prüfung im Sommersemester, wird die Note allein aus der mündlichen Prüfung gebildet.