Introduction
One thing that appears to be important to our generation is music and to obtain the maximum music
experience, whether it is in our cars or in a home theater system, is bass or “bumps”. You often see
drivers adding big subwoofers to their vehicles to over amplify these low tones. Amplifying bass is
comparable to the difference when watching a movie on a 60-inch flat-screen HDTV (high
definition/resolution television) screen or watching it on your friend‟s 20-inch SDTV (standard definition
television).
Bass is actually enhanced by implementing a low-pass filter. You will soon see that passing an audio
signal through a low pass filter is how subwoofers are fabricated. A low-pass filter is a filter that passes
and amplifies low-frequency signals; hence low-pass but cuts out high-frequency or high pitch sounds
such as singing. In audio applications it is sometimes referred to as a high-cut filter, or treble cut filter.
In this lab you will learn the frequency and gain characteristics of a low-pass filter and how it‟s utilized to
filter out high frequency audio signals and amplifies the low signals (tones), essentially bass. You will
gain insight on how your home stereo and or car audio system functions (i.e. what happens when you
push volume up or down, hit the bass boost button, etc.)
IntroductionOne thing that appears to be important to our generation is music and to obtain the maximum musicexperience, whether it is in our cars or in a home theater system, is bass or “bumps”. You often seedrivers adding big subwoofers to their vehicles to over amplify these low tones. Amplifying bass iscomparable to the difference when watching a movie on a 60-inch flat-screen HDTV (highdefinition/resolution television) screen or watching it on your friend‟s 20-inch SDTV (standard definitiontelevision). Bass is actually enhanced by implementing a low-pass filter. You will soon see that passing an audiosignal through a low pass filter is how subwoofers are fabricated. A low-pass filter is a filter that passesand amplifies low-frequency signals; hence low-pass but cuts out high-frequency or high pitch soundssuch as singing. In audio applications it is sometimes referred to as a high-cut filter, or treble cut filter.In this lab you will learn the frequency and gain characteristics of a low-pass filter and how it‟s utilized tofilter out high frequency audio signals and amplifies the low signals (tones), essentially bass. You willgain insight on how your home stereo and or car audio system functions (i.e. what happens when youpush volume up or down, hit the bass boost button, etc.)
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