Dear Angélique, I made my PhD about the topic directivity of sound sources. During this study, we measured the complete directivity of a real human speaker every 15° Horizontally and 10° vertically . There are some data plotted in my thesis on p.110 and appendix D (see pdf attachments). Complete reference for my thesis can be found at: http://www.shaker.de The editor is German but the dissertation is in English. Franck Giron Investigations about the Directivity of Sound Sources Reihe: Berichte aus der Elektrotechnik Schlagwörter: Akustik; Schallquellen; Hörversuche Seitenzahl: 199 ISBN: 3-8265-1876-4 Erscheinungs-datum: November 1996 Concerning the choice of a loudspeaker which replicates the directivity of a human speaker, it could be difficult to find one. It depends what kind of experiments you want to do exactly. There are some mouth simulators around which have been designed for this purpose and are adequate to playback some speech signals, for example: http://www.gras.dk/default.asp?show=frame&id=271 I was satisfied for my research more concerned with room acoustics with the 2 ways loudspeaker from JBL: LSR25P, http://www.jblpro.com/pressroom/lsr_update_july01.htm which is a real studio loudspeaker with a very flat frequency characteristics. The directivity index is relatively similar for the lower frequencies but becomes more directional for the higher ones. It is also a powered speaker which can be of advantage for some measurements (you don't have to carry out a separate amplifier and can directly connect it to the PC line-out or headphone for example). But if you want to reproduce the same speech spectrum as a real human from data recorded with a microphone, you will have to eventually equalize the recorded file, before playing it back trough the loudspeaker, I don't know if the mouth simulator is doing it. Hope it helps somehow, Franck -- Franck Giron, Dr.-Ing. Principal Scientist Sony Deutschland GmbH Stuttgart Technology Center EuTEC - Speech&Sound Project Hedelfinger Str. 61 D-70327 Stuttgart Germany Phone: +49-711-5858-504 Fax: +49-711-5858-740 E-mail: giron@xxxxxxx -- >-----Original Message----- >From: Scharine, Angelique (Civ,ARL/HRED) >[mailto:AScharine@xxxxxxxxxxxx] >Sent: Mittwoch, 15. Juni 2005 03:19 >To: AUDITORY@xxxxxxxxxxxxxxx >Subject: Directional characteristics of the human voice > >I'm hoping that someone could help me find articles describing >the directional characteristics of the human voice. I'm >selecting loudspeakers for an experiment, and I want to be >sure that they replicate the directionality of human speech. >Can anyone point me in the right direction? >A. > >I can't change the direction of the wind, but I can adjust my >sails to always reach my destination. - Jimmy Dean, American >Singer/Television Performer/Sausage Entepreneur > >Angélique A. Scharine Ph. D. >Army Research Lab/HRED >AMSRD-ARL-HR-SD >Building 520 >Aberdeen Proving Ground, MD >21005-5425 > >Office: (410) 278-5957 >DSN: 298-5957 >Fax: (410) 278-3587 > >
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