how does an electrical current convert into soundwaves?
152224
A good example of electricity to sound converter is your system woofer. It consists of two magnetic parts fixed strong permanent magnet, movable electromagnet. The pulsating electric current is passed to electromagnet which produces magnetic field. There exists a force of attraction when current rises and repulsion when current decreases making the electromagnet to move. The diaphragm attached to the electromagnet moves along with it making vibrations in the air surrounding it producing sound.
151356
Converting Amps to Volts at fixed wattage\n\nThe conversion of Amps to Volts is governed by the equation Volts = Watts/Amps\n\nFor Example, 48 watts / 12 Amps = 4 Volts\n\nExplanation\n\nAmps are how many electrons flow past a certain point per second. Volts is a measure of how much force that each electron is under. Think of water in a hose. A gallon a minute (think amps) just dribbles out if it is under low pressure (think voltage). But if you restrict the end of the hose, letting the pressure build up, the water can have more power (like watts), even though it is still only one gallon a minute. In fact the power can grow enormous as the pressure builds, to the point that a water knife can cut a sheet of glass. In the same manner as the voltage is increased a small amount of current can turn into a lot of watts.
904869
amplification by billion volts!
1135708
C\n\nBecause soundwaves are not really particles. They use any kind of medium (solids, liquids, gases) to propagate unlike light which is actual particles of energy which is why light can travel through a vacuum (sun to earth) but Sound cannot
745636
The main concept to understand is that of a carrier wave.  The radio wave is that.  A radio wave is electro-magnetic radiation, which, unlike other waves, is not a vibration within a medium, like sound waves for example, which are the propagation of alternating high and low pressure within the air, or other fluid media.  Electro-magnetic waves are a self propagating electro-magnetic effect which can travel even in a vacuum.  Electro-magnetic radiation is a pulsing stream of energy where the pulses are at a constant frequency.  What we perceive as different phenomenon are in fact the same electromagnetic radiation but at different frequencies.  Microwaves, Radio, Ultra-violet, Visible Light, and Infra-red, are all electro-magnetic radiation moving down the scale from high to low frequency.\n\nThe radio transmitter sends out radio waves at a specific frequency or band of frequencies.  The aerial of the receiver develops tiny electric currents in it as the radio wave flows past it.  These are pulsing currents at the same frequency as the radio wave, but these pulses are not in themselves the content of speech or music.  This content, or signal, is carried in the wave, hence the concept of the carrier wave.\n\nIt is easier to understand Amplitude Modulation or AM radio so I will restrict myself to that.  If you imagine a radio wave as a very long string with the pulses like beads on it, all spaced at precise intervals, then imagine that the beads slowly getter bigger and smaller along its length.  Each bead is a packet of energy in the wave and all occur at the same frequency, but where the beads get bigger there is more energy in the packet.  It only takes a little more imagination now to see how the pattern of a sound wave can be represented by the bulging out of the beads, and their getting smaller.  This is called the amplitude.\n\nLooking at it in practical terms, at the transmitter end sound is converted in the microphone into a corresponding pattern of changes in the current flowing through the microphone.  That is your signal.  That signal which is at a low electrical power, is used to create the same pattern but in a circuit of much higher electrical power - that is what an amplifier does.  The device used to transfer the pattern is called a transistor, which uses the low powered circuit to control the flow in the high powered circuit.\n\nThe amplified signal is fed to the transmitter aerial, so now that pattern of electrical energy, identical to the pattern of the sound picked up by the microphone, comes out of the aerial as radio waves, with the pattern held in the varying amplitude of the radio wave.\n\nNow comes a trick to follow.  If there are thousands of transmitters all radiating radio waves all over the place, how come your radio only picks up the one signal.  This is where the tuner comes in.  The principle of radio tuning depends on the opposite properties of coils and capacitors.  I don't know if you know what these are, but it doesn't matter if you don't.  Both of these devices have a special kind of resistance to electricity known as impedance.  Impedance only operates where the current is varying.  The voltages and currents in our radio Ariel will be varying at exactly the same frequency as each radio wave it is exposed to, so if we pass that current through either a coil or a capacitor there will be an impedance in the circuit.  Now the impedance of the coil increases as the frequency gets higher and the impedance of the capacitor gets higher as the frequency gets lower.  An AM tuning circuit simply passes the signal current through both a coil and a capacitor at the same time, and the capacitor is a mechanically variable one, so by turning a knob you can increase or decrease the capacitance.  The trick here is that as the capacitance changes the circuit will show least impedance to a specific frequency compared with all the others, so provided the frequencies are not too close, as the law requ
341746
Joseq said it first. A microphone is a transducer that converts acoustic energy into electric energy. It does this basically by having a diaphragm attached to a coil that is around a magnet. A speaker does exactly the opposite. It is a transducer that converts electric energy into acoustic energy.
181822
Sound travels in a wave.  Actually travels best through a solid.
145102
1.  To convert low-voltage a.c. to d.c. as occurs in all electronic appliances, e.g. c.d. players, electronic keyboards, stereos, etc.\n2.  As indicators, and appears as coloured lights on electronic appliances,e.g. the graphic equalizer that has a set of lights that moves up and down according to the signal, bass, mid-range, treble, etc, fed to it. Also, when you turn on the stereo and you see a red or green light near to the power switch, that is a light-emitting diode (LED)\n3. Within the last year, a new use is that an array of white LEDs are used to replace the wire-wound bulbs in battery-operated flashlights (torchlights).  Less heat is produced, a brighter light is obtained,  and the batteries last as much as 30 times longer.  This is good news for the ecologists!!
356195
You might find a more accurate answer in an acoustic book, but basically works the same as a speaker, it has some inductors around a magnet that makes a membrane move rapidly making some pressure in the air making the sound.
1039362
You need an energy transformer machine.  You put sound in, press the sound-to-electricity button and out comes electricity.  Make sure you have a storage cell attached or you'll get shocked.
138297
In general, the basis of a sensor is to measure some physical property (sound intensity, temperature, light intensity, position, velocity, acceleration, to name a few) and produce an electrical output that represents the amplitude of the property. There are sensors that don't output an electrical signal but indicate amplitude in some other way such as position. An example would be a mechanical speed governor. But the majority of sensors have an electrical output since we are able to do any needed amount of processing of such a signal.\nMicrophones and motion detectors are examples of acoustic sensors. Microphones generate an electric signal that is an analog of the sound it receives; i.e., the signal shows all the vibrations that make up the sound. This can be amplified and used to drive loudspeakers, recording equipment, etc. (If used to detect motion, this would be called "passive" detection.) Acoustic motion sensors use "active" detection. A very high-frequency loudspeaker sends out an ultrasonic sound signal, which results in a particular signal being reflected from nearby surfaces and returned to a microphone. With nothing in the sound field moving, the microphone receives the same sound frequency as is transmitted and a constant amplitude. A moving object reflects some of the sound back to the microphone at a slightly different frequency (due to the Doppler effect) and with slightly different amplitude due to the changing interference pattern created by the motion. Depending on the type of detector, the frequency and/or amplitude change triggers a detection signal, which then can be used to energize an alarm, open a door, turn on a light, etc.
752479
an electrical wave that travels down the membrane of a cell
526798
If your PCB has a hairline crack and conducting path is intermittent. A sound that is converted into a vibration can cause induced interference at the hairline crack.\n\nBut this is via a transducer (hairline crack), not directly from sound to electrical. This principle was used in the early days on the carbon microphone for the telephone mouth piece.
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Alessandro Volta played with batteries - voltage\nAndre-Marie Ampere experimented with Current\nJames Watt measured and defined power - Watts
810773
The following assumes you want to generate square and\ntriangle waves of relatively low frequencies:\n\nJust use a microcontroller. Use one output pin for the square\nwave and feed it through a D-type flip-flop configured as a \ndivide-by-two to get 50% duty cycle on the output. For the\ntriangle wave you can use PWM (Pulse Width Modulation)\nand hook the output pin to an RC (Resistor Capacitor) filter\nto form a simple D/A (Digital to Analog) converter.\n\nAlternatively, you can either buy a microcontroller with a\nbuilt-in D/A converter or add one externally. This will allow\ngeneration of any arbitrary waveform.\n\nA few of the many manufacturers of suitable microcontrollers\nare: \n\nAtmel, Microchip, Silicon Laboratories, and Texas Instruments.
387680
Ok...you guys got this all wrong.  Voltage doesn't travel.\nThis is simple:\n\nSeries:\nAll series stuff see the same current\n\nParallel:\nAll parallel stuff see the same voltage
539753
All microphones capture sound waves with a thin, flexible diaphragm (or ribbon in the case of ribbon microphones). The vibrations of this element are then converted by various methods into an electrical signal that is an analog of the original sound. Most microphones in use today use electromagnetic generation (dynamic microphones), capacitance change (condenser microphones) or piezoelectric generation to produce the signal from mechanical vibration.\n\nRead more on:\n\nhttp://en.wikipedia.org/wiki/Microphone#Principle_of_operation\n\nand\n\nhttp://www.m2m.ecs.soton.ac.uk/Default.asp?id=35