What does this mean analytically and what can we deduce from that information.
Can sound pressure level deduced from that .If not what do we have to do to get that done.
2007-08-21 08:08:53 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
Hz is the electrical current frequency. The 1750-1800W is the electrical (power) rating in watts. Sound pressure has nothing to do with it.
2007-08-21 08:15:39 · answer #1 · answered by Anonymous · 1⤊ 0⤋
A hair dryer combines a fan and a heating element.
50Hz is the frequency in UK, and some parts of Japan, 60Hz is the frequency in the USA and the rest of Japan. Large motors are frequency sensitive, small motors generally are not.
The power used by a dryer is mainly the heat input, and that is silent. The noisy part of the hair dryer is the fan. The noise relates to the speed of the fan, the size of the fan, the arrangement of vanes in the fan outlet, and how well balanced the rotating parts are. If you really need to know the noise level, you will need a noise meter and a quiet room, and hold the noise meter 1 metre away. Or write to the makers
Two final notes there should also be a voltage rating 220-240 V (Europe, South Asia) or 100-120 V (USA). Plug the average 100-120 V hair drier into a UK/European supply and it will burn out very quickly, drawing 4x the power it is rated at. Conversely a 220-240V drier will be very feeble plugged into at US 110 V supply. (However, power supplies for laptops usually have an internal voltage regulator, and will run at either voltage. )
2007-08-21 10:21:08 · answer #2 · answered by Innealtair 2 · 0⤊ 0⤋
You're on the wrong track. 50/60 hertz is the alternating current frequency and 1750-1800 watts is the power rating. Watts is obtained by amps x volts. As you are using 240 volts the amperage is about 8 amps. There is no way of deducing noise levels from such information.
2007-08-21 08:23:16 · answer #3 · answered by Anonymous · 0⤊ 0⤋
This means that the unit can be used at either 50 or 60 cycles,or Hertz, ie the frequency at which alternating current alternates per second.
The power rating of 1750/1800 watts is the power of the unit at 50/60 cycles.
As for sound levels, don`t know what you mean.
2007-08-21 09:05:38 · answer #4 · answered by firebobby 7 · 0⤊ 0⤋
50/60Hz is the mains frequency it will work with. That's just about everywhere in the world if the voltage is right. 1750 - 1800 watts is the amount of electricity is uses. That's quite a powerful one on full heat - mind you don't burn your hair. The amount of noise it makes is a function of how efficient the fan is. If that's mentioned on the hairdryer, it will be in decibels (dB).
2007-08-21 08:17:37 · answer #5 · answered by Anonymous · 0⤊ 0⤋
hi,the 50/60 hz is the freeqency,cycles per second...1750-1800 w.this means the watts,devide the watts by the voltage the answer will the amps.
2007-08-21 08:23:05 · answer #6 · answered by tugboat 4 · 0⤊ 0⤋
it means the appliance uses resistive heat which is frequency independent, would even heat with DC. the blower motor will work at the lower frequency and not stall, however it is probably is more efficient at 60 Hz. There is no conversion from electrical power data to acoustic power, this is not a "speaker" for your HiFi. you will have to get a sound pressure meter and measure the appliance in operation.
2007-08-21 08:18:59 · answer #7 · answered by lare 7 · 0⤊ 0⤋
The other answers are more or less correct, however if your 1750- 1800 watts is correct then it will burn your hair and your skin off.
Sounds more like a paint stripper to me!
2007-08-22 12:50:28 · answer #8 · answered by mad_jim 3 · 0⤊ 0⤋
it means that your hair drying is designed for alternative current and would deliver between 1.75KW to 1.8KW of power (mainly by joule effect) whitin the mentioned frequency range. The frequency of the alternative current is defined by the number of poles in the alternators producing electricity in power plants. in a given country all alternators are meant to produce current at the same frequency so it is not something which will vary in england.
In France England and other countries we deliver 220V +-10% at 50Hz to consumers and the harmonization is handy when we French sale our electricty to other countries ( as we have plenty of Nuclear plants and since electricty can not be stored we have to do something with it.)
Thank you EDF (electricite de France)
2007-08-21 11:54:08 · answer #9 · answered by Anonymous · 0⤊ 0⤋
nowt to do with sound pressure level
Hertz - Cycles per second (revolutions)
Watts - P = I x R , true measurement of power, and it is that what you pay for in your Electricity bill!
2007-08-24 09:39:26 · answer #10 · answered by Niall S 4 · 0⤊ 0⤋