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The obligatory wise guy answer is always "Because it doesn't know the words." If we get by that there are two basic types of ballasts. The traditional electromagnetic ballast hums more than the newer electronic ballast. Fluorescent fixtures have a sound rating that ranges from "A" to "D" with "A" being the quietest. In electromagnetic ballasts the alternating current causes a magnetic field to basically compress the central iron core in a phenomenon called Magnetostriction. What you are hearing is a 60 Hz vibration that can get louder with age. In an electronic ballast the hum is usually much less noticeable and can again come from vibrations induced by the switching happening in the electronic components.
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The core of an electrical ballast, like the core of a transformer is made of laminated layers of iron material. This type of construction makes it work more efficiently. The Alternating Current (AC) repeatedly magnetizes and demagnetizes the layers in the core causing them to vibrate. The layers are bound together with some sort of glue limiting the actual vibrations and if properly done there is no humming sound.
As the ballast gets older, the glue material weakens allowing the layers to separate and allowing the vibrating layers to hit each other resulting in the humming sound. An old ballast can get pretty loud.
What else can I help you with?
Why does fluorescent light hum flicker?
Fluorescent lights may hum due to the vibration of the internal components, such as the ballast or the bulbs. Flickering can be caused by a faulty starter or ballast, inadequate power supply, or aging bulbs. Regular maintenance and replacing faulty parts can help reduce these issues.
How much does 1 cubic yard of railroad ballast weigh?
1 cubic yard of railroad ballast typically weighs between 2,000 to 2,700 pounds.
What the difference between ballast and transformer?
A transformer changes the amperage and / or voltage. It literally "Transforms" electrical energy. A ballast is like a capacitor. Think of a ballast as a short-term battery. It stores power then releases it as needed. A common example of a ballast is on fluorescent lights. Initially, a fluorescent light needs a big blast of energy to excite the gas molecules into emitting photons (light). Then it only needs a small amount of energy to keep the gas molecules in an excited state. However, that power has to be of consistent amperage and voltage. The ballast is designed to do that. The electrical ballast stores energy in the same way that a water ballast stores water for stability. Because the electrical ballast stores far more power than the device it regulates requires, it too provides a kind of electrical stability. That's why you often see a fluorescent light flicker or "lose stability" when the ballast starts to go bad. A transformer transforms voltage and amperage up or down. A ballast provides a stabile power supply.
Why do train tracks sit on rocks?
The rocks called "ballast" provides a cushion that the ties are embedded in. The ballast can shift some as trains pass over while keeping the ties locked in position so that the rails attached by spikes to the ties cannot shift and bend (which can cause the cars to derail).
What does one cubic meter of ballast weigh?
Dry gravel with a size ranging from one quarter inch to two inches will weigh about 1,682 kilograms per cubic meter.
Why does your electronic ballast hum?
Electronic ballast does not hum as much as a choke. Minute hum of electronic ballast is the small inductor and capacitor producing an oscillation for high voltage generation,
Why does fluorescent light hum flicker?
Fluorescent lights may hum due to the vibration of the internal components, such as the ballast or the bulbs. Flickering can be caused by a faulty starter or ballast, inadequate power supply, or aging bulbs. Regular maintenance and replacing faulty parts can help reduce these issues.
Why do light buzz?
most likely from all of the electricity flowing through them. Incandescent lights do not buzz. Fluorescent fixtures with a non electronic ballast can develop a buzzing or humming noise. The ballast has a wire coiled around an iron laminated core. As the ballast ages the laminations start to separate and the alternating current going through the ballast makes the iron layers vibrate (hitting each other) causing the hum or buzz sound.
What makes a fluorescent light hum loudly?
The sound to which you refer is typically produced in the ballast. A noisy ballast is often an indicator that ballast is not doing well. The ballast is a special purpose transformer, and inside the transformer are coils of wire that are around an iron core. The core is typically a stack of stamped plates made of mild steel that have been riveted or otherwise connected together to provide the necessary mass. When the plates are not tightly bound together, they can move slightly under the changing magnetic field and produce a humming sound that can be quite loud. When that happens, the ballast is about to fail.
Where is the ballast resistor on a 2000 Chrysler Sebring convertible?
It does not have a ballast resistor.It does not have a ballast resistor.
Where is the ballast resistor for a 1994 Jeep Cherokee?
It does not have an ignition ballast resistor.It does not have an ignition ballast resistor.
Ballast smells burnt what to do?
A ballast that smells burnt is going bad. The ballast will have to be replaced to fix the problem.
What is the music name that is kind of a good music to make a streap tease and sounds something like tease me on hum hum hum turn me on hum hum hum and is a female singer?
Goldfrapp - Ooh La La
What does hum mean in texting?
HUM
Do hot dog have hum?
Hum?
What is a good sentence for the word ballast?
A good sentence for the word ballast is.......The ballast is not heavy enough and the boat is about to sink.
How much does a David Brown 880 diesel tractor weigh?
Static weight with opperator -Rear 5430 lb with ballast 2950 lbs without ballast --------------------------------------Front 1810 lb with ballast 1540 lbs without ballast --------------------------------------Total 7240 lb with ballast 4470 lbs without ballast ----
