Multilayer graphene condenser microphone

@article{Todorovi2015MultilayerGC,
  title={Multilayer graphene condenser microphone},
  author={Dejan Todorovi{\'c} and Aleksandar Matkovi'c and M. Mili'cevi'c and Djordje Jovanovi'c and Rado{\vs} Gaji{\'c} and Iva M. Salom and Marko Spasenovi'c},
  journal={2D Materials},
  year={2015},
  volume={2}
}
Vibrating membranes are the cornerstone of acoustic technology, forming the backbone of modern loudspeakers and microphones. Acoustic performance of a condenser microphone is derived mainly from the membrane’s size, surface mass and achievable static tension. The widely studied and available nickel has been a dominant membrane material for professional microphones for several decades. In this paper we introduce multilayer graphene as a membrane material for condenser microphones. The graphene… 

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References

SHOWING 1-10 OF 29 REFERENCES

Electrostatic Graphene Loudspeaker

Graphene has extremely low mass density and high mechanical strength, and key qualities for efficient wide-frequency-response electrostatic audio speaker design. Low mass ensures good high frequency

Graphene electrostatic microphone and ultrasonic radio

Graphene has mechanical properties that make it ideally suited for wide-band ultrasonic transduction, and graphene-based acoustic transmitters and receivers have a wide bandwidth, from the audible region to the ultrasonic region.

Thermophones using carbon nanotubes and alternative nanostructures for high power sound generation and noise cancellation

There is a large promise for thermophones in high power sonar arrays, flexible loudspeakers and noise cancellation devices. The freestanding aerogel-like carbon nanotube sheet as a thermoacoustic

Graphene earphones: entertainment for both humans and animals.

Graphene earphones, packaged into commercial earphone casings can play sounds ranging from 100 Hz to 50 kHz and are demonstrated that a dog wearing a graphene earphone could also be trained and controlled by 35 kHz sound waves.

A flexible, transparent and ultrathin single-layer graphene earphone

Graphene is flexible and transparent with one-atom layer thickness, and is a novel building block with potential applications in future portable devices. Herein a flexible, transparent and ultrathin

Silicon microphone with wide frequency range and high linearity

Thermoacoustic Sound Generation from Monolayer Graphene for Transparent and Flexible Sound Sources

Transparent and flexible loudspeakers are realized with large-area monolayer graphene and the substrate effect on the thermoacoustic sound generation is studied by controlling the surface porosity of various substrates.

Graphene optomechanics realized at microwave frequencies.

This work detects the lowest flexural mode at 24 MHz down to 60 mK, corresponding to 50±6 mechanical quanta, which represents a phonon occupation that is nearly 3 orders of magnitude lower than that which has been recorded to date with graphene resonators.

Optomechanical coupling between a multilayer graphene mechanical resonator and a superconducting microwave cavity.

Coupling between a multilayer graphene resonator with quality factors up to 220,000 and a high-Q superconducting cavity is demonstrated and the cooperativity C, a characterization of coupling strength, is quantitatively extracted from the measurement with no free parameters and found, which is promising for the quantum regime of graphene motion.