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A tuning fork of frequency 300Hz will resonate if a sound wave incident on it has a frequency of what?
Wiki User
∙ 12y ago
300Hz is the natural frequency of the tuning fork hence if a sound wave of same frequency hits the fork then RESONANCE occurs
Wiki User
∙ 12y ago
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What is a frequency of a trumpet?
The trumpet has a nominal capability of playing 30 different notes (an expert can get more) and each note it plays is of a different frequency. There is no one, single "frequency" of a trumpet.
How do you find the fundamental frequency of a sample using a spectrum analyzer?
Looking at the spectrum displayed on the spectrum analyzer, the fundamental will generally be the left-most vertical spike above 0Hz. However, to qualify as the fundamental, this tone must have a specific harmonic relationship to the other components of the sampled signal. The relationship is that every upper tone in the signal should be an integer-multiple of the frequency of the fundamental. Thus, if you find three spikes, one at 200Hz, one at 300Hz and one at 400Hz, the 200Hz tone is not the fundamental. That would be a tone at 100Hz, and the signal you are looking at has a 'suppressed fundamental'. Likewise, if the signal described above also had a spike at 50Hz, this _could_ be the fundamental, where the second harmonic (at 100Hz), third harmonic (at 150Hz) fifth harmonic (at 250Hz) and all harmonics above the sixth are being suppressed. An additional worthy test is to turn off the signal and look at the spectrum. If there are signal components displayed that don't relate to the sample, they would show up after the signal is removed. (I.e., do an analysis of silence, and anything that shows up needs to be subtracted or discounted from the signal spectrum.)
What is complex frequency plane?
300hz
What is a frequency of a trumpet?
The trumpet has a nominal capability of playing 30 different notes (an expert can get more) and each note it plays is of a different frequency. There is no one, single "frequency" of a trumpet.
Do all frequencies of sound travel with the same velocity?
Yes, they do. The frequency of a sound doesn't effect the speed at which it moves; i.e. approx 330meters per second (through air). For example; a sound with a frequency of 600Hz has the same velocity as a sound with frequency 300Hz, the difference being that the sound at 300Hz would have half as many wavelengths in the same distance from source as the sound at 600Hz.
Sound waves whose frequency is 300 Hz have a speed relative to sound waves in the same medium whose frequency is 600 Hz that is?
Since velocity of wave = frequency x wavelength (or v=fλ), and velocity is assumed to be the same for both since they're in the same medium,f1λ1 = f2λ2300λ1 = 9000λ2λ1/λ2 = 9000/300 = 30Thus, the wavelength of the 300Hz frequency sound wave is 30 times greater than the 9000Hz frequency sound wave.
What is the cycles per second for people talking?
From about 150HZ up to about 8kHz or so. The energy mainly in the range of 300Hz to 3kHz.
Why planes uses 300Hz frequency?
Weight is at a premium in aircraft. AC to DC power supplies running at 300 Hz instead of the more common 50 Hz or 60 Hz would require smaller filter capacitors, and thus less weight. The power generator, likewise, would require less mechanical speed step-down, reducing weight. Similarly, transformers and inductors, as well as selsyns, can be much smaller, again, reducing weight.
What is the ear response to incoming sound wave?
The average response of a human ear at the ear drum is flat to about 500 Hz with a peak around 2.5KHz. This means that a tone at 300Hz will sound quieter than a tone with the same SPL output at 2KHz.
What is the frequncy range of digital signal?
Telephone bandpass is 300Hz to 3000Hz. This is adequate for a recognizable and understandable voice, however the lack of high frequencies makes some people sound different on the phone.Local calls often have a slightly wider bandpass, but long distance calls are sharply filtered to cutoff at exactly 3000Hz, to avoid spillover into adjacent channels during the process of frequency division multiplexing so that many voice connections may be sent on one line (e.g. twisted pair, microwave link, optical fiber) at the same time.
Can I rip the rhythm from a CD without the voice?
No. CD data, when decoded is raw PCM audio which contains the waveform of all songs. If you really want to remove voice and don't mind a hit in the quality of your music, you can use a waveform editor (like the free Audacity) to equalize out the most prominent vocal frequencies (in the area of about 300Hz, give or take).
What is bandpass signal?
A bandpass signal, xc(t), is a signal whose one-sided energy spectrum is both: 1) centered at a non-zero frequency, fC, and 2) does not extend in frequency to zero (DC). The two sided transmission bandwidth of a signal is typically denoted by BT Hertz so that the one-sided spectrum of the bandpass signal is zero except in [fC − BT /2,fC + BT /2]. This implies that a bandpass signal satisfies the following constraint: BT /2 < fC. Fig. 1.1 shows a typical bandpass spectrum. Since a bandpass signal, xc(t), is a physically realizable signal it is real valued and consequently the energy spectrum will always be symmetric around f = 0. The relative sizes of BT and fC are not important, only that the spectrum takes negligible values around DC. In telephone modem communications this region of negligible spectral values is only about 300Hz while in satellite communications it can be many Gigahertz.
How do you find the fundamental frequency of a sample using a spectrum analyzer?
Looking at the spectrum displayed on the spectrum analyzer, the fundamental will generally be the left-most vertical spike above 0Hz. However, to qualify as the fundamental, this tone must have a specific harmonic relationship to the other components of the sampled signal. The relationship is that every upper tone in the signal should be an integer-multiple of the frequency of the fundamental. Thus, if you find three spikes, one at 200Hz, one at 300Hz and one at 400Hz, the 200Hz tone is not the fundamental. That would be a tone at 100Hz, and the signal you are looking at has a 'suppressed fundamental'. Likewise, if the signal described above also had a spike at 50Hz, this _could_ be the fundamental, where the second harmonic (at 100Hz), third harmonic (at 150Hz) fifth harmonic (at 250Hz) and all harmonics above the sixth are being suppressed. An additional worthy test is to turn off the signal and look at the spectrum. If there are signal components displayed that don't relate to the sample, they would show up after the signal is removed. (I.e., do an analysis of silence, and anything that shows up needs to be subtracted or discounted from the signal spectrum.)
What is concept of multiplexing in telephone system?
MultiplexingMultiplexing is a form of data transmission in which one communication channel carries several transmissions at the same time. The telephone lines that carry our daily conversations can carry thousands or even more of conversations at a time using multiplexing concept. The exact number of simultaneous transmission depends on the type of communication channel and the data transmission rate.Economics of scale play an important role in the telephone system. It costs essentially the same amount of money to install and maintain a high-bandwidth trunk as low-bandwidth trunk between two switching officers. Consequently, telephone companies have developed elaborate schemes for multiplexing many conversations over a single physical trunk.Accordingly, the communication channel is shared in such a way as to maximum the utilization of the channel capacity. Thus the method of dividing a single channel into many channels so that a number of independent signals may be transmitted on it is known as Multiplexing.Multiplexing schemes can be divided into two basic categories:Frequency Division Multiplexing FDMTime Division Multiplexing TDMFrequency division multiplexing ( FDM) is the technique used to divide the bandwidth available in a physical medium into a number of smaller independent logical channels with each channel having a small bandwidth. The method of using a number of carrier frequencies each of which is modulated by an independent speech signal is in fact frequency division multiplexing.The following figure depict how three voice-grade telephone channels are multiplexing using FDM. When many channels are multiplexed together, 400Hz is allocated to each channel to keep them well separated. First the voice channels are raised in frequency, each by a different amount. Then they can be combined, because no two channels how occupy the same portion of the spectrum. Notice that even though there are gaps(guard bands) between the channels, there is some overlap between adjacent channels, because the filters do not have sharp edges. This overlap means that a strong spike at the edge of one channel will be felt in the adjacent one as non-thermal noise.Frequency-division multiplexing works best with low-speed devices. The frequency division multiplexing schemes used around the world are to some degree standardized. A wide spread standard is 12 400-Hz each voice channels ( 300Hz for user, plus two guard bands of 500Hz each) multiplexed into the 60 to 108 KHz band. Many carriers offer a 48 to 56 kbps leased line service to customers, based on the group. Other standards upto 230000 voice channels also exist.Example:The allocated spectrum is about IMHz, roughly 500 to 1500 KHz. Different (stations, each operating in a portion of the spectrum. With the interchannel separation great enough to prevent interference. This system is an example of frequency division multiplexing.Advantages of FDMHere user can be added to the system by simply adding another pair of transmitter modulator and receiver domodulators.FDM system support full duplex information flow which is required by most of application.Noise problem for analog communication has lesser effect.Disadvantages of FDMIn FDM system, the initial cost is high. This may include the cable between the two ends and the associated connectors for the cable.In FDM system, a problem for one user can sometimes affect others.In FDM system, each user requires a precise carrier frequency.Time Division Multiplexing ( TDM) is another popular method of utilizing the capacity of a physical channel effectively. Each user of the channel is allotted a small time interval during which is may transmit a message. Thus the total time available in the channel is divided and each user is allocated a time slice. In TDM, user send message sequentially one after another. Each user can, however, use the full channel bandwidth during the period he has control over the channel. The channel capacity is fully utilized in TDM by interleaving a number of messages belonging to different users into one long message. This message sent through the physical channel must be separated at the receiving end. Individual chunks of message sent by each user should be reassembled into a full message as shownUnfortunately, TDM can only be used for digital data multiplexing. Since local loops produce analog signals, a conversion is needed from analog to digital in the end office. Where all the individual local loops come together to be combined onto outgoing trucks.Example:In some countries, the individual stations have two logical sub channels : music and advertising. These two alternate in time on the same frequency first a burst of music, then a burst of advertising, then more music and so on. This situation is time division multiplexing.Advantages of TDMIt uses a single linksIt does not require precise carrier matching at both end of the links.Use of capacity is high.Each to expand the number of users on a system at a low cost.There is no need to include identification of the traffic stream on each packet.Disadvantages of TDMThe sensitivity to other user problem is highInitial cost is highTechnical complexity is moreThe noise problem for analog communication has greater effect.
