Electrodynamic pick-up for electric string instruments

• Autorzy: Reszke Edward , Dobrucki Andrzej

Identyfikatory

DOI

10.21008/j.0860-6897.2024.1.05

• Języki publikacji: EN

Abstrakty

EN

The most important elements in electric musical string instruments are pick-ups. They convert vibration of strings into electric signal. Usually, two types of pick-ups are used: electromagnetic and piezoelectric. Electromagnetic pick-up, called also a pick-up with moving armature, converts vibration of string into an electric signal using change of magnetic flux in the magnetic circuit by the vibration of the string made of magnetic material. Vibrating string causes change of the air gap between the string (which is a moving armature) and rest of magnetic circuit. A variable electromotive force is generated in the stationary winding. In order for it to be proportional to the speed of vibration, polarization is needed, which is achieved by using a permanent magnet in the magnetic circuit. In a piezoelectric transducer, an electric current is generated due to the deformation of the piezoelectric material under the influence of a vibrating string. The subject of this paper is description of a stringed instrument with a electrodynamic transducer, which converts mechanical vibration of strings into an electromotive force which is produced between the ends of moving wire placed in the permanent magnetic field. This transducer is also called a transducer with moving wire. A wire (string) is made of a conductive material, but not necessarily a magnetic material. The principle of operation is similar to that of a ribbon microphone. The electromotive force induced at the ends of the string is very small and must be strongly amplified. It’s a novel technique which is applicable in electric stringed instruments such as guitar, violin, viola, cello, double bass, and others.

Słowa kluczowe

EN

electric string instrument; electrodynamic transducer; low-noise amplifier

PL

elektryczny instrument strunowy; przetwornik elektrodynamiczny; wzmacniacz niskoszumowy

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2024
• Tom: Vol. 35, nr 1
• Strony: art. no. 2024105
• Opis fizyczny: Bibliogr. 5 poz., fot. kolor., rys.

Twórcy

autor

Reszke Edward

• Ertec-Poland , ul. Janiny Kłopockiej 13, 54-530 Wroclaw

• https://orcid.org/0000-0001-8704-6463

autor

Dobrucki Andrzej

• Wroclaw University of Science and Technology, Department of Acoustics, Multimedia and Signal Processing, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw

• https://orcid.org/0000-0002-2588-547X

Bibliografia

• 1. L.S. Pardue, K. Buys, M.I. Edinger, D. Overholt, A. McPherson; Separating sound from source: sonic transformation of the violin through electrodynamic pickups and acoustic actuation; Proceedings of the New Interfaces for Musical Expression 2019 conference, 278-283; NIME Proceedings; URL: https://www.nime.org/proceedings/2019/nime2019_paper053.pdf
• 2. A. Dobrucki; Przetworniki elektroakustyczne (in Polish); WNT, Warszawa, 2007
• 3. V. Janašek; Design of ultra-low noise amplifiers; URL: www.janascard.cz
• 4. E. Reszke; A stringed musical instrument with strings constituting elements of a dynamic vibration transducer (in Polish: Strunowy instrument muzyczny ze strunami stanowiącymi elementy dynamicznego przetwornika drgań), Polish Patent Application No. P.445636 (submitted electronically on July 19, 2023)
• 5. A. Dobrucki, E. Reszke; Evaluation of a New Electric Viola with Dynamic, Pickup; Ertec Private Report 1a/2023

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).