DE829818C - Device for sending or receiving sound waves - Google Patents
Device for sending or receiving sound wavesInfo
- Publication number
- DE829818C DE829818C DEA1581A DEA0001581A DE829818C DE 829818 C DE829818 C DE 829818C DE A1581 A DEA1581 A DE A1581A DE A0001581 A DEA0001581 A DE A0001581A DE 829818 C DE829818 C DE 829818C
- Authority
- DE
- Germany
- Prior art keywords
- membrane
- sending
- sound waves
- receiving sound
- bender
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000012528 membrane Substances 0.000 claims description 12
- 239000013078 crystal Substances 0.000 description 4
- 208000000260 Warts Diseases 0.000 description 3
- 201000010153 skin papilloma Diseases 0.000 description 3
- 238000003462 Bender reaction Methods 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 235000011006 sodium potassium tartrate Nutrition 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 210000002105 tongue Anatomy 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Description
Die Erfindung bezieht sich auf eine Vorrichtung zum Senden oder Empfangen von Schallwellen mit einem piezoelektrischen Biegeschwinger. Es ist bekannt, Biegeschwinger unmittelbar mit der schallübertragenden Membran des Systems zu verbinden. Bei derartigen Schwingungsgebilden läßt sich nun, wie Versuche gezeigt haben, eine wesentlich erhöhte Empfindlichkeit erzielen, wenn man Membran und Bieger nicht starr miteinander verbindet, sondern über eine elastische Zwischenlage.The invention relates to a device for transmitting or receiving of sound waves with a piezoelectric flexural oscillator. It is known, flexural oscillators to be connected directly to the sound-transmitting membrane of the system. With such As experiments have shown, vibrational structures can now be significantly increased Achieve sensitivity if the membrane and bender are not rigidly connected to one another, but via an elastic intermediate layer.
In der Zeichnung ist die Erfindung beispieleweise veranschaulicht, und zwar zeigt Fig. i einen Querschnitt durch ein Kristallmikrophon mit Tragplatte, von der Seite gesehen, Fig. 2 eine Draufsicht auf das Mikrophon nach Fig. i, teilweise aufgebrochen.In the drawing, the invention is illustrated by way of example, namely Fig. i shows a cross section through a crystal microphone with support plate, seen from the side, Fig. 2 is a plan view of the microphone of Fig. i, partially broken up.
Das dargestellte Mikrophon besteht im wesentlichen aus einem als Sattelbieger wirkenden Verband von zwei quadratischen Kristallplatten 1, 2 aus Seignettesalz. Der Sattelbieger ist mit zwei diagonal einander gegenüberliegenden Ecken an warzenförmigen Vorsprüngen 3, 4 des Gehäuses 5 festgeklebt, während die beiden anderen Ecken mit warzenförmigen Vorsprüngen 6 einer Membran 7 verbunden sind. Die Verbindung mit der Membran erfolgt ebenfalls durch Verkleben, jedoch nicht unmittelbar, sondern über eine elastische Zwischenlage B. Diese besteht im dargestellten Beispiel aus einer Gummischeibe, die mit dem Bieger und den Membranwarzen durch Lack verbunden i-st. Die Gummizwischenlage gibt dem Kristall die erforderliche Bewegungsfreiheit und bewirkt eine günstigere Anpassung zwischen Bieger und :Membran. Die Belegungen, von denen die obere in Fig. 2 bei 9 zu sehen ist, sind durch Zinnfolien io, ii und Lötfahnen mit Anschlußkontakten 12, 13 zur Abnahme der Mikrophonströme verbunden.The microphone shown consists essentially of a saddle bender effective association of two square crystal plates 1, 2 made of Seignette salt. The saddle bender is wart-shaped with two diagonally opposite corners Projections 3, 4 of the housing 5 glued, while the other two corners with wart-shaped projections 6 of a membrane 7 are connected. The connection with the membrane is also done by gluing, but not directly, but via an elastic intermediate layer B. In the example shown, this consists of a rubber washer that is connected to the bender and the membrane lugs by varnish is. The rubber intermediate layer gives the crystal the necessary freedom of movement and causes a more favorable adaptation between the bender and: the membrane. The assignments, of which the upper one can be seen in Fig. 2 at 9, are through tin foils io, ii and Soldering lugs connected to terminal contacts 12, 13 for taking the microphone currents.
Die Membran 7 ist durch einen Deckel 14 mit Distanzring 15 abgedeckt, der zum mechanischen Schutz und zur Befestigung der Membran dient. Im Deckel 14 sind Löcher 16 für den Schalldurchtritt vorgesehen. Der Boden des Gehäuses 5 mit seinen gelochten Warzen 3, .4 ist von einer aufgeklebten Scheibe 17 bedeckt. Mikrophon und Tragplatte 18 sind durch Gummistäbchen i9 miteinander verbunden, deren Enden in Löcher voll Halterzungen 2o des Mikrophondeckels und entsprechende Löcher der Tragplatte i9 eingreifen.The membrane 7 is covered by a cover 14 with a spacer ring 15, which is used for mechanical protection and for fastening the membrane. In the lid 14 holes 16 are provided for the passage of sound. The bottom of the housing 5 with its perforated warts 3, .4 is covered by a disk 17 glued on. microphone and support plate 18 are connected to each other by rubber rods i9, the ends of which in holes full of retaining tongues 2o of the microphone cover and corresponding holes of the Engage support plate i9.
Die Erfindung ist nicht auf das dargestellte Beispiel beschränkt; insbesondere kann sie auch auf Mikrophone Anwendung finden, deren Kristallbieger nur mit einer Ecke frei schwingt und in der Membranmitte angreift oder exzentrisch mit der Membran verbunden ist.The invention is not limited to the example shown; In particular, it can also be used on microphones, their crystal benders only swings freely with one corner and attacks in the middle of the membrane or eccentrically is connected to the membrane.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA1581A DE829818C (en) | 1950-05-06 | 1950-05-06 | Device for sending or receiving sound waves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA1581A DE829818C (en) | 1950-05-06 | 1950-05-06 | Device for sending or receiving sound waves |
Publications (1)
Publication Number | Publication Date |
---|---|
DE829818C true DE829818C (en) | 1952-01-28 |
Family
ID=6919648
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA1581A Expired DE829818C (en) | 1950-05-06 | 1950-05-06 | Device for sending or receiving sound waves |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE829818C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1167076B (en) * | 1958-05-15 | 1964-04-02 | Zenith Radio Corp | Mechanical impedance matching resonator device |
-
1950
- 1950-05-06 DE DEA1581A patent/DE829818C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1167076B (en) * | 1958-05-15 | 1964-04-02 | Zenith Radio Corp | Mechanical impedance matching resonator device |
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