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1. Audio Glossary of Terms
(Technical/Definitions)
... waves through various mediums and the effects of absorption, diffraction, interference, reflection, and refraction.       • Aliasing Noise - The result of the sampling frequency not being at least double ...
2. Subsonic, what is it and how do I adjust it ?
(Electronics/Car Audio Electronics)
... setting is attenuated (made quieter). As only frequencies higher than your setting pass its a high pass filter. A subsonic frequency is very low, so low the human ear can barely detect it, but your body ...
... one frequency that is louder than them all. This is why we use test tones spaced in 1 Hz increments ! Testing procedure: 1. Use lowered volume, say 1/2 volume, during your test. 2. Install the microphone/sensor ...
4. Find your vehicles resonant frequency
(Technical/Theory and Physics)
The resonance frequency of your car isn’t 65Hz. This is a common belief and one that is completely incorrect. In fact, without a diaphragm, or some other vibrating object, there is no resonance. The term ...
Build Your Own Basic Speaker Crossovers Low Pass: Filter ABOVE the frequency, use COILS High Pass: Filter BELOW the frequency, use CAPACITORS   Use this table to determine capacitor size (must be ...
Download - Test Tone & Frequency Sweep for USB Memory Stick Applications We now supply our Test Tones & Frequency Sweeps in THREE Image formats. This Image is useful for USB Memory Sticks, SD Card inputs, ...
7. Bass, Treble, Hertz ? Which Hz is which range
(Technical/Theory and Physics)
... the same volume of 60hz or 90hz. Mid-Bass (Approximately 140hz-400hz) Mid bass has lots of instruments included in its frequency range. Cello, Bassoon, and Male Voice are samples of "mid-bass" sounds. ...
8. Quarter Wave Theory for Building Walls
(Technical/Theory and Physics)
... conclussion from there. In a wall if the port opening is located ¼ of the tuned frequency’s wave length away from the windshield/microphone you gain constructive interference. This occurs because ...
Download - Test Tones & Frequency Sweeps, MP3 CD Format Our latest addition ! Most modern CD Players and even factory CD Players now support MP3 formats for playback.  Our original Nero Audio CD image ...
10. Enclosure & Port Selection, Definitive Guide
(DIY Articles/Car Audio Do It Yourself)
... longer ports to tune to the same frequency as a large box. You also need to take into account port size in relation to woofer size; as if it’s too small it will make a hissing "choof" noise.  How ...
... $349.95       $249.95 Common to all Models Frequency Response: 25-200Hz (ZX300.1 25-20kHz), +0/-1dB Input Sensitivity: High Level 250mV-10V, Low Level 125mV-5V Signal-to-Noise Ratio: >95dB, a-weighted, ...
... 211mmW x ...mmL)                   263                  263 MSRP                                                              $449.95           $349.95 Common to all Models Frequency Response: 20Hz-200Hz, ...
13. The ABC 8th Order Bandpass
(DIY Articles/Car Audio Do It Yourself)
... and substantial peak at a higher frequency makes this a great enclosure type for SPL competition. Like all bandpass boxes, this one is pretty finicky about air volumes. Make sure you're measurements are ...
14. Boyles Law, how it applies to an SPL system
(Technical/Theory and Physics)
... the box. Energize the woofer at some frequency and measure the pressure. Pull the microphone out, seal the hole, place the box inside a car and measure the pressure inside the car at the same frequency ...
... AC Amps. Volts with a DMM, Amps with an AC Clamp. You need to blow a single test tone for the test as well, as voltage & amperage will change depending on frequency. 60hz is the recognised frequency ...
16. How to use an Oscilloscope (CRO) to identify clipping
(Electronics/Car Audio Electronics)
... must use a tone source (CD or generator) Q. Can I do this for my full range amps too? A. Yes, just use a higher range test tone around the center of the frequency range your amp will be driving. Introducing ...
17. SPL Tuning Your System on a dB Meter
(DIY Articles/Car Audio Do It Yourself)
... of WinISD, Enclosure Calc, and the 1/4 wave tuning frequency method or anything else... Those are the theoretical ways of doing all this. This is the hands on way of doing the tuning, and it seems to work ...
18. Car Audio on a Budget, The $1000 System
(Install/Car Audio Installation)
... more trouble reproducing bass than any other frequency. Back to high pass filters, once they are set properly for your speakers, they will allow the speaker to play the band of frequencies it was designed ...
... stiffness), in m/N D: Effective diameter of driver, in meters F3: -3 dB cutoff frequency, in Hz Fb: Enclosure resonance (usually for bass reflex systems), in Hz Fc: System resonance (usually ...
20. Eliminate Engine Noise
(Electronics/Auto Electrical for the Car Stereo)
... concern in cars because it can be easily shielded against. EMI on the other hand is low frequency magnetic noise that cannot be shielded against. EMI can get into the system in two ways through ground ...
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