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What is the difference between radio frequency and audio frequency?
They terms frequency are essentially the same, except radio waves are electromagnetic, and acoustic waves are pressure waves. An audio frequency is a range of frequencies that we can hear, approx up to 20Khz, anything past 20Khz is said to be radio waves
What type of waves which used in radio stations?
electromagnetic waves they are basically used by all types only some have different names and are a type of it Like wireless is : Hertzian waves (electromagnetic waves) well the elctormagnetic waves can smd!
How does the frequency and wavelength of a radio wave compare to other waves?
Frequencies and wavelengths are best described by looking at ripples on a pond. The wavelength is the distance between ripples, and the frequency is how many ripples go by a given spot in a second. If you can imagine holding something and splashing it into the water, you can make patterns in the ripples. For example, splashing for a second, being quiet for a second, then splashing for another second could be a code for something. By varying your codes, you can put all kinds of information in the ripples. The thing is, you can't splash faster than the ripples will go out across the water. Basically, you can't carry information that varies any more than about half of the frequency of the wave you are sending it on (this is called Nyquist's theorem). This is what limits how much information can be sent on a given frequency. If you vary how big you make the ripples, this is called Amplitude Modulation, or AM. If you vary how fast you make the ripples, this is called Frequency Modulation. You've probably heard of these terms before, since radio bands have been specifically set aside for voice transmissions using these methods, and the radio bands have over the years taken on the name of the type of modulation used. There's nothing particularly special about the type of modulation though. You could easily use FM modulation on frequencies that we would consider to be in the AM band. It's just that the FCC has restricted those bands to using only those types of signals. Your television, for example, uses FM to carry the voice and AM to carry the picture. Most of the things you mention are just variations on how to encode data onto radio waves. It's all the same thing. The FCC sets up various bands of frequencies that you can use for certain things, so that all of the different things agree and can talk to each other. A radio built in the US might not work at all in other areas of the world, because their radio stations aren't governed by the FCC and might have different frequencies assigned to them. This web site: http://www.ntia.doc.gov/osmhome/allochrt.pdf (warning, PDF file) has the frequency allocations for the United States. Other parts of the world will be different. The one thing you mentioned that is slightly different is a cordless keyboard. These use infra-red light. It's still the same thing. Infra-red light, just like visible light, is just another frequency of electromagnetic radiation, just like radio waves and x-rays. Your TV remote control also uses infra-red light. It's still exactly the same thing, the signal you want to transmit is encoded onto the light, the same way that signals are encoded onto radio waves. Most of the frequencies that we can do anything useful with have been allocated for something, so if you come out with some new whiz bang device (like say digital radio) then the FCC may have to change some of its frequency allocations to let it be commonly used by the public.
What is tultul?
tultul is the one' of the instrument that occupies limits.
What is galtons whistle method?
Galton's whistle method, developed by Sir Francis Galton in the late 19th century, is a technique used to investigate the range of human hearing, particularly in relation to high-frequency sounds. It involves using a specially designed whistle that can produce sounds at frequencies beyond the upper limit of human hearing, which is typically around 20 kHz. By adjusting the frequency and observing individuals' responses, Galton aimed to understand the variations in auditory sensitivity among people. This method contributed to the study of human perceptions and the limits of sensory capabilities.
What is the maximum frequency deviation?
Maximum frequency deviation refers to the extent to which the frequency of a modulated signal can vary from its unmodulated carrier frequency. In frequency modulation (FM), this deviation is typically specified in hertz or as a percentage of the carrier frequency. It plays a crucial role in determining the bandwidth of the FM signal and affects the fidelity of the transmitted information. Regulatory standards often set limits on maximum frequency deviation to ensure effective communication and minimize interference.
What is audio singnal?
An audio signal is a representation of sound, typically as an electrical voltage. Audio signals have frequencies in the audio frequency range of roughly 20 to 20,000 Hz (the limits of human hearing).
Can a high frequency carrier wave travel longer distance than low frequency carrier wave?
High frequency radio waves over ~100 MHz will usually travel only in a straight line - hence these applications are called 'line of sight'. Waves of lower frequency, say 500KHz to 30MHz (rough values only) are bounced off the ionosphere and can travel round the world. Waves of very low frequency, 10 KHz to 20KHz, can penetrate sea water, and are used to communicate with subs. But they are of such low frequency that they can carry no effective modulation other than ON or OFF. But they can do a job that nothing else can do.
Why is an inductor called a choke?
An inductor is called a choke because it "chokes" or limits the flow of alternating current (AC) while allowing direct current (DC) to pass through. It acts as a choke to high-frequency signals, effectively blocking them while allowing DC or low-frequency signals to pass.
Which meter has the highest accuracy in the prescribed limits of frequency RANGE?
A digital frequency meter typically has the highest accuracy within its prescribed limits of frequency range compared to analog frequency meters. Digital frequency meters offer precise frequency measurements with less likelihood of error due to their advanced technology and digital display.
What limits a DSL connection's capacity?
The distance from the customer to the carrier's switching facility.
What is the time limits for filing insurance claims to a commercial carrier?
There is no time limit
Why do semi's need to stop at weight stations on the highway?
All commercial trucks are subject to total vehicle weight limits and also weight limits per axle. The scales are there to enforce these weight limits.
Do moving trucks have to stop at weigh stations?
Yes, moving trucks are typically required to stop at weigh stations to ensure they are not exceeding weight limits set by regulations.
How does a modem translate the signals?
This is a both a simple and complicated question at the same time. The digital side doesn't require much understanding of digital circuits to comprehend how a bit stream can be created on the pin of a chip. The analog side requires a basic understanding of analog electronics, transceivers (transmitters/receivers), and/or carrier MOdulation/DEModulation (MODEM).We will limit the conversation to a single hardwired connection between two computers, isolated from all outside influence; separate transmit and receive carriers (full duplex), and all MODEM handshaking completed (carriers synchronized). In such a controlled sandbox, all users that contribute to this explanation can explore the details of the communication process in this fixed reference frame. As questions are presented, we can peel back some of the definitives.Let's say the digital connection of MODEM 1 has a small text message in its buffer that it wants to send to MODEM 2. The content of the message is "Hello". These five characters have a specific bit pattern (specified in a standard 7 Bit ASCII table) that is translated into a bit stream:Character >HelloASCII >481665166C166C166F16Bit Patterns >0010 10000110 01010110 11000110 11000110 1111Bit Stream >0010100001100101011011000110110001101111(BMP Image Does Not Appear)Modulation SignalThis bit stream will be sent to the transmitters' modulation stage to be impressed on the carrier one bit at a time. We'll use simple FM, and the bit timing will have an intra-bit voltage level halfway between zero and one that corresponds to the carrier's center frequency. This straight binary to FM technique is over simplified and very wasteful of the capacity of these carrier bandwidths.MODULATION: If the part of the bit stream present at the modulation stage input is a zero (0), the carrier frequency will be decreased to its lower frequency limit. If the bit stream is at the intra-bit level, the carrier frequency will be at its center frequency. If the bit present at the modulation stage input is a one (1), the carrier frequency will be increased to its upper frequency limit. This sequence of events applied to the entire 40 bit message will amount to the carrier of the transmitting modem shifting from center frequency, to low limit, to center frequency, to high limit, to center frequency, toggling between limits for the entire five character (40 bit) message.DEMODULATION: At the receiving end, MODEM 2 is listening to the carrier shift through these patterns, and as it does, it rebuilds the shifting carrier into the original digital bit pattern and clocks it into its own buffer.
What is the difference between stated and real class limits?
Real Class Limits are the class intervals of a frequency distribution when stated as in continuous categories. ie. 18.5-19.5, 20.7-34.7 Stated Class Limits are the class intervals of a frequency distribution when stated as discrete categories. ie. 19-21, 23-25
What is the wake frequency?
TEMPSENS WAKE FREQUENCY CALCULATOR is easy to use and it also ensures that thermowell is designed within the dimensional limits of PTC19.3, 2010. This calculator establishes the practical design considerations for Thermowell installations in power and process piping, which also incorporates the latest theory in the areas of natural frequency, Strouhal frequency, in-line resonance and stress evaluation.If the application is fulfilling all limits of the ASMT PTC 19.3, it means the Thermowell met 5 criteria:Operating temperatureWake frequency calculation (resonance limits)Fatigue stressBending strengthsOperating pressure
