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What is the hearing frequncy range of donkey?
Their hearing range is typically 10 Hz to 40,000 Hz. It just depends on the animals age and their location.
What is the time duration of one- half cycle of AC power?
The time duration of one-half cycle of AC power is determined by the frequency of the AC signal. In most countries, the standard frequency is either 50 Hz or 60 Hz. At 50 Hz, one complete cycle lasts 20 milliseconds, so one-half cycle would be 10 milliseconds. At 60 Hz, one complete cycle lasts approximately 16.67 milliseconds, making one-half cycle about 8.33 milliseconds.
What is the definition of audio-frequency transformer?
An audio frequency transformer is a transformer designed to operate in the range of frequencies audible to the average human. This range is generally accepted to be from 20 Hz to 20,000 Hz. The usual purpose of an audio transformer is to match impedances between circuit sections. For example: between a microphone and the input of an amplifier, (input transformer), or between the output of an amplifier and the loud speaker. (output transformer).
What is better 60 hz or 600 hz television?
600. Absolutely.
What is voiceband?
In electronics and communications, voiceband is a term we apply to the "group" or band of frequencies that cover the range of human hearing. That range is generally 20 Hertz (Hz or cycles per second - cps) to 20 kiloHertz. That's 20 Hz to 20 kHz in the shorthand of the trade. Oh, and a link is provided below to get you to the Wikipedia article on voiceband. Hey, the nice folks over there provide knowledge for free. Why not surf on over and help yourself?
What is the normal vocal range for a human voice?
The normal vocal range for a human voice is typically between 80 Hz to 1100 Hz for men and 200 Hz to 1200 Hz for women.
What is the lowest vocal range that a human voice can reach?
The lowest vocal range that a human voice can reach is typically around 80 Hz for men and 130 Hz for women.
What is the human voice frequency?
The human voice frequency range typically spans from about 85 Hz to 255 Hz for adult males and 165 Hz to 255 Hz for adult females. However, this range can vary based on individual differences and factors such as age and physiological characteristics.
Frequency range of telephonic signal?
There is a bit of an argument on the exact baseband pass frequency for telephone audio, but generally it is in the range of 300 hz to 3000 hz.
What is the highest range of the human voice?
The highest range of the human voice is typically around 1130 Hz, which corresponds to the high end of the soprano vocal range.
What is the range of human voice frequencies?
The voiced speech of a typical adult male will have a fundamental frequency from 85 to 180 Hz, and that of a typical adult female from 165 to 255 Hz
Is 560 Hz a stronger or weaker signal than 7.83 Hz?
560 Hz is a stronger signal than 7.83 Hz because it has a higher frequency, which means it oscillates more times per second. In terms of human perception, 560 Hz falls within the audible range while 7.83 Hz is in the extremely low-frequency range known as the Schumann Resonance.
Why Doppler VOR subcarrier frequency is 9960 Hz?
The 9960 Hz subcarrier is the same for conventional VOR (CVOR) or Doppler VOR (DVOR). A conventional VOR has three Amplitude Modulated (AM) signals encoded on a VHF carrier: 1) a 30 Hz variable (VAR), which is modulated by the antenna, not the transmitter; 2) a 9960 subcarrier, which is in turn frequency modulated (FM) with a 30 Hz reference (REF) signal; 3) and a voice / identifier channel, which includes 1020 Hz "Morse code" identifiers and aural voice signals. The VAR signal is created by spinning a slightly directional antenna at 1800 rpm (30 revolutions per second). The phase of this 30 Hz signal is variable, dependent on the location of the receiver. To determine VOR bearing, another 30 Hz signal is required. The REF signal is perceived as being the same phase regardless of position of the receiver relative to the VOR. Here is the problem: the VAR 30 Hz signal is already modulated on the carrier. If the REF 30 Hz signal is modulated onto the carrier without processing, a receiver would find two 30 Hz signals (just one signal if REF and VAR signals are in phase). How would the receiver know which signal is the REF and which is the VAR? To get around this problem, the VOR takes a 9960 Hz carrier and frequency modulates this carrier with the REF 30 Hz signal. The modulation index is 15, meaning the 9960 carrier has a deviation of 450 Hz (30 Hz times 15). In other words, the subcarrier varies between 9510 Hz to 10410 Hz (9960 +&- 450 Hz). This frequency excursion occurs 30 times per second (30 Hz). The subcarrier signal spectrum does not overlap with the spectra of the VAR or aural signal; therefor it can be amplitude modulated on the RF carrier. The reason for frequency modulation of the REF signal on the 9960 carrier, as opposed to amplitude modulating the REF signal, is that the AM detector in a VOR receiver would still output two 30 Hz ambiguous signals and a 9960 signal, all summed together. The VOR instrumentation processor takes the detected VOR signal (called VOR composite video signal (COMP)), and processes the signal as follows: 1) COMP is processed through a low pass filter that preserves 30 Hz to get the VAR signal; 2) COMP is processed through a high pass filter to reject the VAR and aural signals, then an amplitude limiter, and then though an FM detector to get the REF signal. The FM detector could be a discriminator (used in the bad old days), or a phase lock loop (used in modern equipment); 3) COMP is not processed by VOR instrumentation; however it may be filtered to please the listener, i.e. range filter (1020 Hz bandpass), voice filter (200 to 3000 Hz bandpass). Why 9960 Hz and not something lower? The baseband spectrum of the whole VOR signal consists of a reasonably narrow 30 Hz signal (VAR), the aural / ident signal (approximately 200 Hz to 3000 Hz), and the 9960 subcarrier (9510 to 10410 Hz). No overlap can be allowed. Also, the receiver has to separate the signals; therefore a significant gap between the signals is provided. A Doppler VOR varies from a conventional VOR in that the VAR channel is 30 Hz frequency modulated instead of 30 Hz amplitude modulated. The spectrum of the CVOR REF signal is a narrow signal at the RF carrier frequency (fc) (between 108 to 117.95 MHz), and two side bands, one at fc + 30 Hz and the other at fc - 30 Hz. The DVOR REF signal has the same spectrum components as the CVOR REF signal, with the addition of sidebands at (plus and minus) 60 Hz, 90 Hz, 120 Hz ... and on (diminishing in amplitude). The VOR receiver does not react to the sidebands at 60 Hz and above because the VAR signal is separated by a low pass filter; therefore it does not matter to the receiver whether the signal comes from a CVOR or DVOR.
Frequency range for a female voice?
Frequency of femal adult is 165 hz to 255 hz.
What is the bandwidth of Telephone signal?
A tradition phone line has a sampling rate of 2400 baud but a baud is not a bit. A traditional phone line can transmit at close to 100 kbit/sec. To cleanly transmit a voice takes about 10 kbit/sec.
How does vor works?
A conventional VOR (CVOR) has three Amplitude Modulated (AM) signals encoded on a VHF carrier:1) a 30 Hz variable (VAR), which is modulated by the antenna, not the transmitter;2) a 9960 Hz subcarrier, which is in turn frequency modulated (FM) with a 30 Hz reference (REF) signal;3) and a voice / identifier channel, which includes 1020 Hz "Morse code" identifiers and aural voice signals.The 9960 Hz subcarrier and the voice / identifier channel is the same for CVOR and Doppler VOR (DVOR). The explanation for the generation of the VAR signal offered below applies to CVOR. For explanation of the VAR signal of DVOR, see http://wiki.answers.com/Q/Explain%20both%20doppler%20aswell%20as%20convenional%20vor.The VAR signal is created by spinning a slightly directional antenna at 1800 rpm (30 revolutions per second). The phase of this 30 Hz signal is variable, dependent on the location of the receiver.To determine VOR bearing, another 30 Hz signal is required. The REF signal is perceived as being the same phase regardless of position of the receiver relative to the VOR.Here is the problem: the VAR 30 Hz signal is already modulated on the carrier. If the REF 30 Hz signal is modulated onto the carrier without processing, a receiver would find two 30 Hz signals (just one signal if REF and VAR signals are in phase). How would the receiver know which signal is the REF and which is the VAR?To get around this problem, the VOR takes a 9960 Hz carrier and frequency modulates this carrier with the REF 30 Hz signal. The modulation index is 15, meaning the 9960 carrier has a deviation of 450 Hz (30 Hz times 15). In other words, the subcarrier varies between 9510 Hz to 10410 Hz (9960 +&- 450 Hz). This frequency excursion occurs 30 times per second (30 Hz). The subcarrier signal spectrum does not overlap with the spectra of the VAR or aural signal; therefor it can be amplitude modulated on the RF carrier.The reason for frequency modulation of the REF signal on the 9960 carrier, as opposed to amplitude modulating the REF signal, is that the AM detector in a VOR receiver would still output two 30 Hz ambiguous signals and a 9960 signal, all summed together.The VOR instrumentation processor takes the detected VOR signal (called VOR composite video signal (COMP)), and processes the signal as follows:1) COMP is processed through a low pass filter that preserves 30 Hz to get the VAR signal;2) COMP is processed through a high pass filter to reject the VAR and aural signals, then an amplitude limiter, and then though an FM detector to get the REF signal. The FM detector could be a discriminator (used in the bad old days), or a phase lock loop (used in modern equipment);3) COMP is not processed by VOR instrumentation; however it may be filtered to please the listener, i.e. range filter (1020 Hz bandpass), voice filter (200 to 3000 Hz bandpass). VOR bearing (magnetic direction away from the VOR) is simply the phase angle of the VAR signal minus the phase angle of the REF signal.Why 9960 Hz and not something lower? The baseband spectrum of the whole VOR signal consists of a reasonably narrow 30 Hz signal (VAR), the aural / ident signal (approximately 200 Hz to 3000 Hz), and the 9960 subcarrier (9510 to 10410 Hz). No overlap can be allowed. Also, the receiver has to separate the signals; therefore a significant gap between the signals is provided.A Doppler VOR varies from a conventional VOR in that the VAR channel is 30 Hz frequency modulated instead of 30 Hz amplitude modulated. The spectrum of the CVOR REF signal is a narrow signal at the RF carrier frequency (fc) (between 108 to 117.95 MHz), and two side bands, one at fc + 30 Hz and the other at fc - 30 Hz. The DVOR REF signal has the same spectrum components as the CVOR REF signal, with the addition of sidebands at (plus and minus) 60 Hz, 90 Hz, 120 Hz ... and on (diminishing in amplitude). The VOR receiver does react to the sidebands at 60 Hz and above because the VAR signal is separated by a low pass filter; therefore it does not matter to the receiver whether the signal comes from a CVOR or DVOR.
A voice signal sample is stored as one byte Frequency range is 16 Hz to 20 Hz What is the memorysize required to store 4 minutes voice signal?
It's 1920Bytes. As the bandwidth (f2-f1) is 20-16=4Hz. The sampling frequency should be twice the bandwidth (2B). the sampling frequency is 8Hz= 8 samples= 8 cycles/second. 4 minutes=(4*60) =240 Seconds 1sample->1 Byte 1Second->8 Samples 240 Seconds->(240*8) = 1920 Samples
