MEMS electrodynamic loudspeakers for mobile phones

Lemarquand, Guy; Ravaud, Romain; Shahosseini, Iman; Lemarquand, V.; Moulin, Johan; Lefeuvre, Élie

doi:10.1016/j.apacoust.2011.10.013

Cited by 22 publications

(15 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The airgap width, b a , has direct influence on the acoustic friction element, R a [Eq. (14)]. From Fig.…”

Section: Optimizationmentioning

confidence: 96%

“…10 Electrodynamically actuated MEMS-loudspeakers are based on the Lorentz force on a current driven coil in the magnetic field of a permanent magnet. [11][12][13][14] Either the permanent magnet or the coil is attached to the membrane. So far, the most promising results have been achieved by the piezoelectric 5 and the electrodynamic 12,14 setups.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetostrictive microelectromechanical loudspeaker

Albach

Lerch

2013

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

A microelectromechnical-loudspeaker based on the magnetostrictive effect is presented. The membrane consists of a comb structure of monomorph bending cantilevers with an area of about 16 mm(2). Prototypes generate a sound pressure level (SPL) of up to 102 dB at 450 Hz with a total harmonic distortion of 2% inside a 2 cm(3) measurement volume. The fabrication process of the device as well as a coupled simulation model to calculate its sound pressure is introduced. The model reproduces the measurements and is employed to further optimize the loudspeaker membrane. As a result, a computed maximum SPL of 106 dB has been achieved with a -6 dB frequency range extending from 100 Hz to 2.6 kHz.

show abstract

“…The airgap width, b a , has direct influence on the acoustic friction element, R a [Eq. (14)]. From Fig.…”

Section: Optimizationmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Magnetostrictive microelectromechanical loudspeaker

Albach

Lerch

2013

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

show abstract

“…In an ideal condition, the vibrating diaphragm of the loudspeaker can correlate with the input signal. Unfortunately, the conversion has not perfect caused by the nonlinearity of loudspeaker components [4][5][6][7][8]. The nonlinearity of loudspeakers is produced by nonlinear component consisting back EMF (electromagnetic field), spring, the mass of cone and inductance.…”

Section: Introductionmentioning

confidence: 99%

Nonlinearity compensation of low-frequency loudspeaker response using internal model controller

Yudaningtyas¹,

Khabib²,

Djuriatno³

et al. 2019

TELKOMNIKA

View full text Add to dashboard Cite

This paper presents the nonlinearity compensation of low-frequency loudspeaker response. The loudspeaker is dedicated to measuring the response of Electret Condenser Microphone which operated in the arterial pulse region. The nonlinearity of loudspeaker has several problems which cause the nonlinearity behaviour consists of the back electromagnetic field, spring, mass of cone and inductance. Nonlinearity compensation is done using the Internal Model Controller with voltage feedback linearization. Several signal tests consist of step, impulse and sine wave signal are examined on different frequencies to validate the effectiveness of the design. The result showed that the Internal Mode Controller can achieve the high-speed response with a small error value.

show abstract

“…The current microspeakers (based on the voice coil) are power inefficient [1] and also larger in size (Table 1). Evidently, a successful realization of efficient and thin MEMS microspeakers with good acoustic output could address the drawbacks of the current microspeakers.…”

Section: Introductionmentioning

confidence: 99%

Cricket Inspired High Efficiency MEMS Speakers

Garud¹,

Godthi²,

Reddy³

et al. 2017

Proceedings of Eurosensors 2017, Paris, France, 3–6 September 2017

View full text Add to dashboard Cite

Abstract:We report on the realization of a biomimetic MEMS speaker inspired by field crickets. This speaker is at least five times thinner and four times more efficient than the current dynamic speakers used in portable electronics. We present results of the acoustic characterization of a single MEMS speaker. Computational extrapolation of the results suggests that an array of such thin speakers will be highly efficient compared to the existing speakers of equal area.

show abstract

MEMS electrodynamic loudspeakers for mobile phones

Cited by 22 publications

References 14 publications

Magnetostrictive microelectromechanical loudspeaker

Magnetostrictive microelectromechanical loudspeaker

Nonlinearity compensation of low-frequency loudspeaker response using internal model controller

Cricket Inspired High Efficiency MEMS Speakers

Contact Info

Product

Resources

About