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The Nano-guitar String that Plays Itself

Scientists at Lancaster University and the University of Oxford have created a nano-electronic circuit which vibrates without any external force.

Using a tiny suspended wire, resembling a vibrating guitar string, their experiment shows how a simple nano-device can generate motion directly from an electrical current.

To create the device, the researchers took a carbon nanotube, which is wire with a diameter of about 3 nanometers, roughly 100,000 times thinner than a guitar string. They mounted it on metal supports at each end, and then cooled it to a temperature of 0.02 degrees above absolute zero. The central part of the wire was free to vibrate, which the researchers could detect by passing a current through it and measuring a change in electrical resistance.

Just as a guitar string vibrates when it is plucked, the wire vibrates when it is forced into motion by an oscillating voltage. This was exactly as the researchers expected.

The surprise came when they repeated the experiment without the forcing voltage. Under the right conditions, the wire oscillated of its own accord.

The nano-guitar string was playing itself.

Lead researcher Dr Edward Laird of Lancaster University said: “It took us a while to work out what was causing the vibrations, but we eventually understood. In such a tiny device, it is important that an electrical current consists of individual electrons. The electrons hop one by one onto the wire, each giving it a small push. Usually these pushes are random, but we realized that when you control the parameters just right, they will synchronize and generate an oscillation.”

So what note does the nano-guitar play?

“The nanotube is far thinner than a guitar string, so it oscillates at much higher frequency — well into the ultrasound range so no human would be able to hear it.

“However, we can still assign it a note. Its frequency is 231 million hertz, which means it’s an A string, pitched 21 octaves above standard tuning.”

The nano-oscillator could be used to amplify tiny forces, such as in novel microscopes, or to measure the viscosity of exotic quantum fluids. These experiments will be pursued in a new laboratory that Dr Laird is setting up in the Physics Department at Lancaster, supported by a €2.7M grant from the European Union.

Credit: https://www.lancaster.ac.uk/news/the-nano-guitar-string-that-plays-itself

Written by: Phawin Phanudom

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Noise and Vibration Product News

PLACID new range of integrating sound level meters with calibrator (type 2)

PLACID developed a new range of integrating sound level meters with a calibrator. The integrating sound level meter and calibrator are robust yet light and very easy to use.

Ideal for safety officers in factories, for sound enforcement in entertainment venues, to measure noise nuisance, road traffic, airport noise etc. etc.

Read more about PLACID instruments.

PLACID CA-02 Calibrator for sound level meter

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Noise and Vibration Product News

SPEKTRA improved True Free Field Calibration system, CS18FF

SPEKTRA improved True Free Field Calibration system, CS18FF

SPEKTRA improved True Free Field Calibration system, CS18FF

  • CS18 FF: The Free Field Calibration System contains a newly improved anechoic chamber.
  • The new developed chamber is very easy to disassemble and assemble, practical for shipping , moving.
  • It has excellent free field properties in the full range of frequencies from 125 Hz to 20 kHz
  • A LED lightning system has been added to the chamber
  • To position the DUT precisely and read out the sound level meter display clearly we 2 camera’s are installed in the anechoic chamber.
  • The modular structure of the chamber allows an easy modification of the anechoic chamber for other frequency ranges or test purposes
  • The anechoic chamber is equipped with 4 wheels for easy handling / moving

SPEKTRA CS18FF datasheet

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Noise and Vibration Product News

Nor145 released !

Nor145 released !

Nor145 is a single channel unit optimized for easy connectivity to NorCloud, NorRemote or Nor850, through the built-in WLAN and 3G/4G LTE modem. Read more.

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Noise and Vibration Product News

What should be the sound of electric cars ?

Look at this great TED talk by Renzo Vitale, click here.

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Noise and Vibration Product News

Sonocat, revolutionary techniques for measuring in situ sound absorption and 3D sound intensity

Sonocat, a revolutionary new instrument developed by Soundinsight from the Netherlands, now already available in Asia!

The Sonocat measures sound pressure, 3D sound intensity and in-situ sound absorption, all controlled by intuitive software.

Read more about the new Sonocat or contact us for a demo.

 

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Noise and Vibration Product News

New Noise dosimeters introduced: Casella dBadge 2

Geonoise is now representing dBadge and dBadge2 dosimeter for accurate occupational hazard noise registration.

dbadge2 charging

Very light and small, easy to use yet with high performance, the new dBadge2 dosimeter.

Read more.

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Noise and Vibration Product News

Geonoise Thailand: acoustic laboratory tests expanded

Geonoise Thailand’s acoustic laboratory expanded it’s services again, here below a short overview:

Do let us know your requirements, we can perform independent, ISO confirmed acoustic tests in our laboratory.

Contact us.

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Noise and Vibration Product News

Hearing Screening for safety officers and clinics

Hearing Screening is a very important part of noise awareness and preventing noise induced hearling loss. There is a good trend of hearing screening at more and more places such as (primary) schools, safety departments of factories, clinics etc. It is just so easy to do (just a few minutes for 1 test, no medical degree needed), repeat it every year and you have a solid history of the hearing of an employee, student, singer etc.

We are proud to represent Oscilla Hearing Screening, we can supply the equipment as well as an audiometric booth (optional, not necessary).

Hearing screening occupational healthcare Oscilla Asia

For more info click here.

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Noise and Vibration Product News

SPEKTRA FECB, Final Electrical Calibration Bench

SPEKTRA FECB, Final Electrical Calibration Bench

The new FECB is launched and there are 2 datasheets available, one shows the laboratory version, the other one the mobile version.

Both Final Electrical Calibration benches will allow the electrical calibration of all CS18 – VCU´s.

SPEKTRA developed the mobile version of the FECB for onside calibration of systems, which cannot leave the facilities of the customer. It will come in two stable and re-usable shipping containers. For sure, the mobile version of the FECB is suitable for stationary laboratory usage.

SPEKTRA_FECB_mobile_Data_Sheet_en

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