AJ Design Software Subwoofer Engineering Math Science Freeware Programs


Subwoofer - Audio - Speaker - Sound
AJ Audio Subwoofer Design Software	Design software for solving the required calculations for building bandpass, sealed and vented speaker and subwoofer box designs. Build, plan and design your own custom sub boxes and speaker enclosures for home, car, truck, boat and sport utility vehicle applications.
4th Order Bandpass Subwoofer Box Calculator	Solve parameters related to fourth order bandpass enclosures, sealed rear chamber Q, passband ripple, low and high frequency rolloff, driver resonance frequency, driver total Q, front chamber port tuning frequency, overall bandwidth, ported front and sealed rear chamber net volume, equivalent air compliance, cone effective radiation area, cone peak linear displacement, cone diameter plus one third of surround, maximum air volume displaced by cone excursion, port or vent length and minimum diameter, end correction factor and sensitivity gain.
Crossover Calculator	Online application for solving inductor and capacitor values for first, second, third and fourth order passive crossover systems for two way speaker systems (high and low pass filters). Solutions include Butterworth, Linkwitz-Riley, Bessel, Chebychev, Legendre, Gaussian and Linear-phase type calculations.
Sealed Closed Subwoofer Box Calculator	Solve parameters related to closed boxes, speaker system total Q, driver total Q, system resonance frequency, driver resonance frequency, equivalent air compliance, minus three decibel half power frequency, net box internal volume, free air reference efficiency, driver electrical Q, peak sound pressure level, maximum air volume displaced by cone excursion, cone effective radiation area, cone peak linear displacement, cone diameter plus one third of surround, air density, sound speed in air, maximum displacement limited linear power output, maximum driver power input, required electrical input to achieve Par, efficiency bandwidth product and air volume with same acoustic compliance as the driver suspension.
Sealed Designer Online	Online design software for solving closed and sealed subwoofer box designs. Includes a plot for comparing decibels versus frequency response.
Sound Wave Calculator	Solve problems in relationship to sound pressure level (SPL), point source sound intensity, emitted power, frequency, wavelength, decibels, watts, least audible sound, human ear hearing threshold, damage and noise pollution level (NPL).
Subwoofer Vent Calculator	Online design software tool for solving the length of a subwoofer vent or port given diameter, number of ports, volume of enclosure, tuning frequency and end correction factor. Determine the minimum port diameter to prevent port wind noise.
Vented Ported Subwoofer Box Calculator	Solve parameters related to vented and ported enclosures, free air reference efficiency, cone effective radiation area, cone peak linear displacement, cone diameter plus one third of surround, box volume, driver electrical Q, driver resonance frequency, efficiency bandwidth product, driver total Q, tuning frequency, minus three decibel half power frequency, driver resonance frequency, peak sound pressure level, port or vent length and minimum diameter, end correction factor and air volume with same acoustic compliance as the driver suspension.

Fluid Mechanics - Hydraulics - Flow Properties
Bernoulli Theorem Calculator	Online script for solving any variable in the Bernoulli Theorem equation. Solve for head loss, static head, elevation, pressure energy, velocity energy, density and acceleration of gravity. Assists in the computations for leak discharge, pipe networks, tanks, sluice gates, weirs, pilot tubes, nozzles and open channel flow. The flow is assumed to be streamline, steady state, inviscid and incompressible.
Continuity Calculator	Solve for flow rate, area and velocity in the continuity equation.
Darcy Weisbach Calculator	Online solver for any variable in the Darcy-Weisbach equation. Solve for head loss, friction factor, pipe diameter, pipe length, flow velocity and acceleration of gravity
Fluid Pressure Calculator	Solve for different variables related to force, area, bulk modulus, compressibility, change in volume, fluid column top and bottom pressure, density, acceleration of gravity, depth, height, absolute, atmospheric and gauge pressure.
Hazen Williams Calculator	Solve for any variable in the Hazen Williams equation. Variables include flow rate, discharge, mean velocity, pipe diameter, hydraulic radius, hydraulic grade line slope and friction coefficient.
Manning Calculator	Solve for flow velocity, roughness coefficient, hydraulic radius and energy grade line slope.
Minor Losses Calculator	Solve for any variable in the minor loss equation. Variables include closed conduit energy loss coefficient, velocity and head loss. K values for butterfly valves, check valves, gate valves, globes valves, elbows, entrances, and outlets are included.
Pipe Flow Calculator	Online Java program for solving Type I, II and III pipe fluid flow fluid mechanics problems using Swamee & Jain, Darcy-Weisbach, Colebrook and Hazen-Williams equations. Solve for flow rate, head loss, friction factor and diameter of a pipe.
Pump Calculator	Solve problems related to cavitation, net positive suction head (NPSH), liquid velocity, impeller centerline inlet pressure, vapor pressure, specific weight of fluid, gravity, pump discharge, total head, pump efficiency, water horsepower and brake horsepower.
Reynolds Number Calculator	PHP script for solving any of the variable in the Reynolds Number equation to analyze laminar, turbulent, and transitional flow. Reynold's Number analyzes the proportion of inertia and viscous force hydraulic effect. Variables include Reynolds Number, density, velocity, characteristic length and viscosity.
Stokes Law Calculator	Solve problems related to terminal, fall, and settling velocity, particle diameter and density, density and viscosity of medium (e.g. water, air, oil) and acceleration of gravity.
Venturi Meter Calculator	Online software for computing flow rate measurement and pressure differential using the Bernoulli equation for a Venturi gauge device.

Math - Geometry - Trigonometry
Quadratic Equation Calculator	Script solver for the quadratic equation. Calculates the variable x in the polynomial expression of degree 2, ax²+bx+c=0. Solves the x intercepts of a parabola.
Triangle Equations Calculator	Solve various attributes of different types of triangles. Triangle types include equilateral, isosceles, right and scalene. Attributes include sides, angles, altitudes, medians, angle bisectors, perimeters, semiperimeters, areas, base, Law of Cosines and Sines, height, radius of circumscribed circles, Pythagorean Theorem, radius of inscribed circles.
Geometric Formulas Calculator	Solve various attributes of shapes and solids. Make calculations for circle, parallelogram, rectangle, square, trapezoid, right circular cone, right circular cylinder, pyramid, rectangular solid, and sphere geometric formulas. Geometry attributes include volume, area, perimeter, surface area, radius, length and circumference.

Physics - Electricity - Motion
Circular Motion Calculator	Solve problems related to centripetal acceleration, velocity, radius, period, orbits and satellites.
Constant Acceleration Motion Calculator	Online program for calculating various equations related to constant acceleration motion. Calculator includes solutions for initial and final velocity, acceleration, displacement distance and time. Equations can be used for one, two and three dimensional space.
Friction Equations Calculator	Solve for kinetic friction, static friction, normal force, coefficient, maximum frictional force.
Hooke's Law Calculator	Solutions for force, spring force constant, distance from equilibrium, potential energy, spring stretch length and spring equilibrium position.
Power Calculator	Solves for variables related to power, force, time, displacement and velocity.
Projectile Motion Calculator	Solves problems related to projectile motion, vertical displacement and velocity, horizontal displacement and velocity, range, projection angle, time and acceleration of gravity. Note, solutions for time include the addition and subtraction of the quadric square root.
Radioactive Material Calculator	Solves solutions in relationship to nuclei, nuclear reactions, half life time, disintegration constant, becquerels, curie, Avogadro's number, equivalent radiation dose, damage, absorbed dose, radionuclide, ionizing activity, atomic weight, quality factor, roentgen equivalent man (rem), rad, sievert and gray.
Specific Gravity Calculator	Solves solutions related to buoyancy, Archimedes' principle, specific gravity, air weight, equal volume water weight, submerged weight loss.
Stress Strain Calculator	Solves solutions related to stress, strain, force, change in length and original length and area.
Thermal Expansion Calculator	Solves solutions related to linear expansion coefficient, volume expansion coefficient, length and temperature change.
Torque Calculator	Solves equations in relation to torque, force and distance or length.
Wing Lift Equations Equations Calculator	Solve for any variable in the aircraft or airplane wing lift equation. Variables include airfoil lift force, lift coefficient, air density, surface area and velocity.

Automotive
Engine Displacement Calculator	Solve problems related to engine displacement, piston surface area and diameter, single cylinder volume and engine stroke.
Engine Equations Calculator	Solve problems related to volumetric efficiency , cubic in displacement , air flow rate, compression ratio, piston decks, stroke length, cylinders, head gasket thickness and volume, compression ratio, fuel system injector size and combustion chamber volume.
Fuel Efficiency Economy Comparison Calculator	Solves various equations related to fuel efficiency, economy, price, mile per gallon (MPG), gasoline and diesel. Calculate the amount and cost of fuel needed to travel a specified distance . In addition, analyze the differences between two automobiles.
Horsepower Equations Calculator	Solves various equations related to horsepower. Solve for horsepower, torque, power to weight ratio, and revolutions per minute(rpm). Determine engine and motor performance using the ET and trap-speed methods. Calculate changes in horsepower when after market or performance parts have been added to a vehicle. Determine dyno correction factor. Correct horsepower for normally aspirated internal combustion engines to a standard humidity, pressure and temperature after a dynamometer measurement.
Gear Equations Calculator	Solve problems related to gears, transfer cases, transmissions, axles, differentials, aspect ratio, effective and crawl ratios, speed (MPH), tire radius, rim diameter, rotation velocity (RPM).
Tire Size Comparison Calculator	Solve problems related to tire size, wheel, rim, aspect ratio, width, circumference, diameter, speed, sidewall and speedometer reading.

Air and Water Pollution Treatment - Solid Waste Management - Control
Activated Sludge Calculator	Solve problems related to wastewater, sludge volume index, settling volume and suspended solids concentration.
Atmospheric Dispersion Model Calculator	Solve problems related to atmosphere dispersion modeling, plume contaminant concentration at a point in space, ground level concentration, centerline concentration, emission source, effective and physical stack height, plume rise, gas exit speed and heat emission rate, stability parameter conditions, weather station wind speed and elevation, superadiabatic, neutral condition, subadiabatic, downwind direction, standard deviation, measured and average wind speed, gaseous diffusion, and Gaussian model.
Biochemical Oxygen Demand Calculator	Solve problems related to BOD, ultimate, seeded and unseeded BOD, deoxygenation rate constant and time.
Cyclone Calculator	Solve problems involving cyclone inlet and radial velocity, particle density, air or gas density, radial distance, rotational velocity, particle diameter, pressure drop, gas flow rate, absolute pressure, temperature, proportionality factor, settling velocity, separation factor, approximate effective turns, inlet height and width, cylinder length, cone length, cut diameter and air gas viscosity.
Electrodialysis Membrane Design Calculator	Solve problems related to electrodialysis membranes, filtration, purification, current, Faraday's constant, flow rate, solution normality, number of cells, power, voltage, resistance, removal efficiency and current efficiency.
Flocculation Calculator	Solve problems associated with flocculators, velocity gradient, input and dissipated power, drag coefficient, paddle area, water density, relative paddle velocity, dynamic viscosity and tank volume.
Ideal Reactor Calculator	Solve problems related to completely mixed reactors, continuously stirred tanks, step input, pulse input, reactors in series, concentration, volume, flow rate, and theoretical mean residence time.
Microorganism Kinetics Calculator	Solve problems related to bacteria specific growth rate, maximum specific growth rate, saturation constant, half velocity constant, growth limiting substrate concentration.
Reverse Osmosis Membrane Design Calculator	Solve problems related to reverse osmosis membranes, osmotic pressure and coefficient, number of ions per molecule, concentration, universal gas constant, temperature, rejection, influent feed and effluent permeate concentration, water flux, membrane diffusivity of water, molar volume, thickness, pressure differential and salt flux, solute flux.
Trommel Screen Calculator	Solve problems related to trommel screen critical speed, acceleration of gravity, drum radius, cascading, cataracting and centrifuging.
Ultrafiltration Membrane Design Calculator	Solve problems related to ultra-filtration membranes, membrane pressure differential, water flux, membrane and gel layer resistance and osmotic pressure differential.
Venturi Scrubber Calculator	Solve problems related to venturi scrubbers, pressure drop, gas velocity and water to gas volume ratio.

Note:	This online software site provides a resource for solving math, algebra, chemistry, geometry, trigonometry, physics and science problems. Covers problems and solutions at the grade school, middle school, high school, university and college course levels. Students, teachers, instructors, professors, educators, and tutors feel free to use charts, images, diagrams, formulas, answers, pictures, graphs, plots, code, figures and equations in your school lesson plans, assignments, tutorials, help or review sessions, examples, class room presentations, lectures, research trials, lab experiments, instruction manuals, jobs, papers, helper worksheets, tests, exams, quizzes, projects, essays, how to guides and homework.
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