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A fundamental tone has only one?
A fundamental tone has only one frequency. It is the lowest frequency produced by a vibrating object and is also known as the first harmonic.
How can one accurately measure the frequency in hertz (Hz) of a given signal or waveform?
To accurately measure the frequency in hertz (Hz) of a signal or waveform, one can use an oscilloscope or a frequency counter. These devices can analyze the signal and provide a numerical value for its frequency in hertz.
What is the difference between frequency distortion and phase distortion?
A signal that suffers frequency distortion has one of its frequencies shifted higher or lower. A signal that suffers phase distortion has one of its frequencies shifted in time compared to others. Take, for example, a square wave. Shift the phase of the primary harmonic and you have a mess that sounds the same pitch but different. If you shifted the frequency, it would sound higher or lower.
What is the use of local oscillator?
Trasmitting stations have their own transmitting frequency. No one can construct an amplifier which amplifies signals over a wide range. So every transmitting frequency has to be changed to one particular frequency. This is known as INTERMEDIATE frequency (IF) This is quite possible by getting beats. So a signal is to generated whose frequency is just more than the incoming frequency by IF This signal is named as local singnal which is generated by the LOCAL oscillator.
What is formed at a fundamental frequency or an overtone?
An overtone is the music counterpart of harmonics in audio electronics. A harmonic is the multiple of the fundamental frequency. For example, if the fundamental frequency is 1,000 Hertz (cycles per second), then the second harmonic is twice of the fundamental or 2,000 Hertz. So it goes on such that: 3rd harmonic or overtone is 3,000 Hertz 4th is 4,000 Hertz and so on. Remember that one Hertz is equal to one wave cycle per second. So the higher the harmonic or overtone, the higher is the frequency compared to the fundamental.
What is harmonic imaging?
The article in the related link describes how harmonic imaging is used in ultrasound devices. Basically, you transmit at one frequency, but listen for one of the harmonic frequencies (a whole-number multiple of the original frequency: according to the article, usually the 2nd harmonic, which is double the original frequency - so if the original frequency is 20,000 Hz, then you are listening in the 40,000 Hz range)
What is the frequency of mono?
There is no frequency of mono. Mono is a one channel signal, stereo is a two channel signal.
What happens if we sample the signal at sampling frequency nearer to signal frequency?
If you sample at more than the Nyquist frequency (one half the signal frequency) you introduce an aliasing distortion, seen as sub harmonics.
A fundamental tone has only one?
A fundamental tone has only one frequency. It is the lowest frequency produced by a vibrating object and is also known as the first harmonic.
How can one accurately measure the frequency in hertz (Hz) of a given signal or waveform?
To accurately measure the frequency in hertz (Hz) of a signal or waveform, one can use an oscilloscope or a frequency counter. These devices can analyze the signal and provide a numerical value for its frequency in hertz.
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.)
Why sinusoidal signal is called basic signal?
The sinusoidal signal is called a basic signal because, by Fourier Analysis, you can not further reduce it. It is one sine wave of one frequency of one amplitude of one phase. It has no harmonics. If you converted it from time domain to frequency domain you would only get one line, at the fundamental frequency.
What is the fundamental frequency?
For a waveform containing harmonics, the harmonic frequencies are multiples of what is known as the 'fundamental' frequency. For example, for a waveform that contains 'third harmonics', the fundamental frequency is one-third the frequency of the harmonics. The fundamental frequency of vocal folds the speech mechanism as sound generator.
What is the difference between frequency distortion and phase distortion?
A signal that suffers frequency distortion has one of its frequencies shifted higher or lower. A signal that suffers phase distortion has one of its frequencies shifted in time compared to others. Take, for example, a square wave. Shift the phase of the primary harmonic and you have a mess that sounds the same pitch but different. If you shifted the frequency, it would sound higher or lower.
What happens when a stronger signal and a weaker signal both overlap at the same frequency in frequency modulation?
If one signal is weaker and the other is stronger, the receiver captures the stronger signal and completely ignores the weaker one, resulting in adequate reception.
What is the use of local oscillator?
Trasmitting stations have their own transmitting frequency. No one can construct an amplifier which amplifies signals over a wide range. So every transmitting frequency has to be changed to one particular frequency. This is known as INTERMEDIATE frequency (IF) This is quite possible by getting beats. So a signal is to generated whose frequency is just more than the incoming frequency by IF This signal is named as local singnal which is generated by the LOCAL oscillator.
What is formed at a fundamental frequency or an overtone?
An overtone is the music counterpart of harmonics in audio electronics. A harmonic is the multiple of the fundamental frequency. For example, if the fundamental frequency is 1,000 Hertz (cycles per second), then the second harmonic is twice of the fundamental or 2,000 Hertz. So it goes on such that: 3rd harmonic or overtone is 3,000 Hertz 4th is 4,000 Hertz and so on. Remember that one Hertz is equal to one wave cycle per second. So the higher the harmonic or overtone, the higher is the frequency compared to the fundamental.
