![ECG Filtering](http://s1.studyres.com/store/data/008476978_1-c61ddf62fdba02c4866cb389087a0ffb-300x300.png)
Minimum Devices Active-only Current-mode Universal Filter
... Abstract— An active-only devices current-mode universal filter using the biquadratic transfer function is proposed. The proposed circuit is realized focusing on the minimized active-only components count without external passive elements. The different kinds of filter function as low-pass, high-pass ...
... Abstract— An active-only devices current-mode universal filter using the biquadratic transfer function is proposed. The proposed circuit is realized focusing on the minimized active-only components count without external passive elements. The different kinds of filter function as low-pass, high-pass ...
sound - Vicphysics
... Loudspeakers are dynamic microphones in reverse. The voltage signal from the amplifier is fed into a coil inside a magnetic field. The coil oscillates with the variation of the voltage. The coil is connected to a large diaphragm which can push forward creating a compression or pull back creating a r ...
... Loudspeakers are dynamic microphones in reverse. The voltage signal from the amplifier is fed into a coil inside a magnetic field. The coil oscillates with the variation of the voltage. The coil is connected to a large diaphragm which can push forward creating a compression or pull back creating a r ...
Transmitters-1 - Chelmsford Amateur Radio Society
... Modern synthesisers use dual loops to get small step sizes ...
... Modern synthesisers use dual loops to get small step sizes ...
Audio Fundamentals Part 1
... Frequency of waves is measured in Hz (Hertz), which equals Cycles/ Second. Typically accepted bandwidth of human auditory system is about 20Hz - 20kHz. 20Hz is a very low deep sub bass. 20kHz is a very high frequency that a lot of people can’t hear and audio systems have a hard time to reproduce. A ...
... Frequency of waves is measured in Hz (Hertz), which equals Cycles/ Second. Typically accepted bandwidth of human auditory system is about 20Hz - 20kHz. 20Hz is a very low deep sub bass. 20kHz is a very high frequency that a lot of people can’t hear and audio systems have a hard time to reproduce. A ...
Equalization (audio)
![](https://commons.wikimedia.org/wiki/Special:FilePath/Graphic_equalizer.jpg?width=300)
Equalization (British: equalisation) is the process of adjusting the balance between frequency components within an electronic signal. The most well known use of equalization is in sound recording and reproduction but there are many other applications in electronics and telecommunications. The circuit or equipment used to achieve equalization is called an equalizer. These devices strengthen (boost) or weaken (cut) the energy of specific frequency bands.In sound recording and reproduction, equalization is the process commonly used to alter the frequency response of an audio system using linear filters. Most hi-fi equipment uses relatively simple filters to make bass and treble adjustments. Graphic and parametric equalizers have much more flexibility in tailoring the frequency content of an audio signal. An equalizer is the circuit or equipment used to achieve equalization. Since equalizers, ""adjust the amplitude of audio signals at particular frequencies,"" they are, ""in other words, frequency-specific volume knobs.""In the field of audio electronics, the term ""equalization"" has come to include the adjustment of frequency responses for practical or aesthetic reasons, often resulting in a net response that is not truly equalized. The term EQ specifically refers to this variant of the term. Stereos typically have adjustable equalizers which boost or cut bass or treble frequencies. Broadcast and recording studios use sophisticated equalizers capable of much more detailed adjustments, such as eliminating unwanted sounds or making certain instruments or voices more prominent.Equalizers are used in recording studios, radio studios and production control rooms, and live sound reinforcement to correct the response of microphones, instrument pick-ups, loudspeakers, and hall acoustics. Equalization may also be used to eliminate unwanted sounds, make certain instruments or voices more prominent, enhance particular aspects of an instrument's tone, or combat feedback (howling) in a public address system. Equalizers are also used in music production to adjust the timbre of individual instruments by adjusting their frequency content and to fit individual instruments within the overall frequency spectrum of the mix.The most common equalizers in music production are parametric, semi-parametric, graphic, peak, and program equalizers. Graphic equalizers are often included in consumer audio equipment and software which plays music on home computers. Parametric equalizers require more expertise than graphic equalizers, and they can provide more specific compensation or alteration around a chosen frequency. This may be used in order to remove (or to create) a resonance, for instance.