Skip to main content
added 84 characters in body
Source Link
Mark Leavitt
  • 6k
  • 1
  • 9
  • 16

Not sure what you mean exactly by "vibrations of different textures" but let's assume you want an instrument you would drag over a surface and record its texture.

A microphone is designed to sense vibrations in air, so it's not directly usable. But you could put it in a little chamber with a diaphragm on one end. If the diaphragm had a bump or stylus on the outside, you could drag it over the surface, causing pressure changes in the chamber, and the microphone would pick it up.

D Duck's suggestion of a phonograph cartridge is good, but they are a bit delicate. With either that or the microphone, I think the vibrations may be below the audio frequency range, unless the texture is fine and the dragging is fast. If you're old enough to remember -- the legs of corduroy pants rubbing against each other makes an audible sound.

An accelerometer may be a better low-frequency sensor for vibrations. Just mount it on a PCB and have a stylus that sticks out, in contact with the PCB. An analog accelerometer would give you an analog waveform output, and you can test the concept with an oscilloscope.

To build a practical device, a digital accelerometer would be better, in connection with a microcontroller such as an Arduino. You will need filtering to eliminate DC and low frequency components due to gravity.

Not sure what you mean exactly by "vibrations of different textures" but let's assume you want an instrument you would drag over a surface and record its texture.

A microphone is designed to sense vibrations in air, so it's not directly usable. But you could put it in a little chamber with a diaphragm on one end. If the diaphragm had a bump or stylus on the outside, you could drag it over the surface, causing pressure changes in the chamber, and the microphone would pick it up.

D Duck's suggestion of a phonograph cartridge is good, but they are a bit delicate. With either that or the microphone, I think the vibrations may be below the audio frequency range, unless the texture is fine and the dragging is fast. If you're old enough to remember -- the legs of corduroy pants rubbing against each other makes an audible sound.

An accelerometer may be a better low-frequency sensor for vibrations. Just mount it on a PCB and have a stylus that sticks out, in contact with the PCB. An analog accelerometer would give you an analog waveform output, and you can test the concept with an oscilloscope.

To build a practical device, a digital accelerometer would be better, in connection with a microcontroller such as an Arduino.

Not sure what you mean exactly by "vibrations of different textures" but let's assume you want an instrument you would drag over a surface and record its texture.

A microphone is designed to sense vibrations in air, so it's not directly usable. But you could put it in a little chamber with a diaphragm on one end. If the diaphragm had a bump or stylus on the outside, you could drag it over the surface, causing pressure changes in the chamber, and the microphone would pick it up.

D Duck's suggestion of a phonograph cartridge is good, but they are a bit delicate. With either that or the microphone, I think the vibrations may be below the audio frequency range, unless the texture is fine and the dragging is fast. If you're old enough to remember -- the legs of corduroy pants rubbing against each other makes an audible sound.

An accelerometer may be a better low-frequency sensor for vibrations. Just mount it on a PCB and have a stylus that sticks out, in contact with the PCB. An analog accelerometer would give you an analog waveform output, and you can test the concept with an oscilloscope.

To build a practical device, a digital accelerometer would be better, in connection with a microcontroller such as an Arduino. You will need filtering to eliminate DC and low frequency components due to gravity.

Source Link
Mark Leavitt
  • 6k
  • 1
  • 9
  • 16

Not sure what you mean exactly by "vibrations of different textures" but let's assume you want an instrument you would drag over a surface and record its texture.

A microphone is designed to sense vibrations in air, so it's not directly usable. But you could put it in a little chamber with a diaphragm on one end. If the diaphragm had a bump or stylus on the outside, you could drag it over the surface, causing pressure changes in the chamber, and the microphone would pick it up.

D Duck's suggestion of a phonograph cartridge is good, but they are a bit delicate. With either that or the microphone, I think the vibrations may be below the audio frequency range, unless the texture is fine and the dragging is fast. If you're old enough to remember -- the legs of corduroy pants rubbing against each other makes an audible sound.

An accelerometer may be a better low-frequency sensor for vibrations. Just mount it on a PCB and have a stylus that sticks out, in contact with the PCB. An analog accelerometer would give you an analog waveform output, and you can test the concept with an oscilloscope.

To build a practical device, a digital accelerometer would be better, in connection with a microcontroller such as an Arduino.