Enceinte acoustique

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Ingenium, 2004.1736.002
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TYPE D’OBJET
horn
DATE
1935
NUMÉRO DE L’ARTEFACT
2004.1736.002
FABRICANT
University Loudspeakers Inc.
MODÈLE
SAH
EMPLACEMENT
White Plains, New York, United States of America

Plus d’information


Renseignements généraux

Nº de série
S/O
Nº de partie
2
Nombre total de parties
3
Ou
S/O
Brevets
S/O
Description générale
metal/ synthetic parts

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur
S/O
Largeur
S/O
Hauteur
13,5 cm
Épaisseur
S/O
Poids
S/O
Diamètre
10,3 cm
Volume
S/O

Lexique

Groupe
Communications
Catégorie
Son
Sous-catégorie
S/O

Fabricant

Ou
University Loudspeakers
Pays
United States of America
État/province
New York
Ville
White Plains

Contexte

Pays
Canada
État/province
Québec
Période
mid 1930s +
Canada
Used by les Soeurs de la Charité de Montreal, the Sisters of Charity of Montreal (Soeurs Grises/Grey Nuns). The order was established by Mme Marguerite d'Youville in Montreal in 1737 to serve to poor and sick. The Grey Nuns run hospitals, orphanages, schools, homes for the aged, institutions for the blind, and other social services and works of charity in various parts of Canada and the United States. D'Youville was officially recognized as a Saint of the Roman Catholic Church in 1990.
Fonction
Used to convert an electrical audio signal into sound waves.
Technique
An example of a horn loudspeaker. A horn loudspeaker consists of a tapered horn coupled to a sound reproducer. The latter consists of a vibrating diaphragm or coil actuated by an electromagnet. These convert an electrical signal into vibrations. When this "driver" is coupled to the narrow end of a suitably designed horn, the vibration of the diaphragm or coil causes similar vibrations in air pressure within the horn. These are propagated through space in the form of sound waves. The use of horns for sound reproduction dates back to Edison's invention of the phonograph in 1877. This pre-electric system employed purely mechanical means of generating vibrations; i.e. a stylus attached to the diaphragm. Development reached a new level of sophistication in the 1920s, as horns were adapted for electrical sound reproduction for use in radio receivers, record players, and public address systems [notably in movie theatres]. The Western Electric 31A is based on patents by David G. Blattner [1935] and Henry C. Harrison [1929], engineers with Bell Telephone Laboratories, Maurray Hill, NJ. Their designs were concerned with optimizing the shape of the horn to transmit a broad band of frequencies efficiently, uniformly and without distortion. Western Electric's Bell Labs was a major centre of development in electrical sound reproduction systems between the World Wars. Horn speakers are known for their efficiency and low distortion. However in order to handle low frequencies they must be very large. For this reason they have been largely superseded by dynamic, or cone, speakers in consumer sound systems. Even here, small horns may be incorporated as tweeters to handle the high end.
Notes sur la région
Inconnu

Détails

Marques
red and gold label mostly obscured by paint is probably similar to the one on 2004.1336.1 which reads 'MODEL SAH/ UNIVERSITY/ LOUDSPEAKERS INC/ University [script, logo] WHITE PLAINS/ NEW YORK/ 25 WATTS/ 16 OHMS/ / MADE IN U.S.A.'/ raised lettering reads 'UNIVERSITY REFLEX MODEL SAH'
Manque
unknown
Fini
original glossy grey? largely painted over with flat beige
Décoration
white red and black logo on label reads in script 'University'

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Si vous souhaitez publier de l’information sur cet objet de collection, veuillez indiquer ce qui suit :

University Loudspeakers Inc., Enceinte acoustique, apres 1935, Numéro de l'artefact 2004.1736, Ingenium - Musées des sciences et de l'innovation du Canada, http://collection.ingeniumcanada.org/fr/id/2004.1736.002/

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