MARTINDALE'S

CALCULATORS ON-LINE CENTER

PART I: F-H

HAM RADIO, HI-FI, ACOUSTICS, NOISE EXPOSURE

(Calculators, Applets, Spreadsheets,
and where Applicable includes: Courses, Manuals,
Handbooks, Simulations, Animations, Videos, etc.)


US/Pacific: Tuesday, May 13, 2008
Sydney, Australia: Wednesday, May 14, 2008

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Currently the Calculators On-Line Center contains

over "23,490" Calculators


Ham Radio

Amateur & Commercial Radio Exams

Amateur Radio Design ~ Antenna ~ Call Sign ~ Distance & Location

Frequency & Wavelength ~ Grid Location


Acoustics, Noise, Sound, Speaker Design

Acoustics

Indoor & OutdoorAcoustics & Audio Systmem
(Videos/Movies & Audio/Sound)

Music Acoustics & Vibrations ~ Room Acoustics, Eigenmodes & Reverberation Time


Noise & Noise Exposure


Sound
(Absorption of Sound, Speed of Sound, Sound Pressure Level, etc.)


Microphone Design


Speaker Design

How a Speaker Works ~ Circuit, Box & Speaker Design ~ Crossover

Car Speaker Design ~ Horn Speaker Design ~ Loudspeaker Design


Calculators On-Line Center, Part I:F-H


Calculators On-Line Center Home Page





Ham Radio








Acoustics, Audio & Movies Acoustics, Noise Exposure,

Sound, Speaker Design, Horns, Loudspeakers



ACOUSTICS

Indoor & Outdoor Acoustics & Audio Systmems

Music Acoustics & Vibrations

Room Acoustics, Eigenmodes & Reverberation Time


NOISE & NOISE EXPOSURE


SOUND
(Absorption of Sound, Speed of Sound, Sound Pressure Level, etc.)


MICROPHONE DESIGN


SPEAKER DESIGN

How a Speaker Works ~ Circuit, Box & Speaker Design

Crossover ~ Car Speaker Design ~ Horn Speaker Design ~ Loudspeaker Design



    Acoustics


      INDOOR AND OUTDOOR AUDIO & VIDEO ACOUSTICS & AUDIO SYSTEMS CALCULATORS & APPLETS

        ACOUSTICS CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS

        ACOUSTICAL ENGINEERING CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS

        ACOUSTIC CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS

        AUDIO CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS

        FOR RELATED ACOUSTICS & AUDIO CALCULATORS SEE


        ACOUSTICS CALCULATORS FOR THE INTEGRATION OF SOUND AND VIDEO SYSTEMS - Mc Squared System Design Group, North Vancouver, BC, Canada VERY VERY VERY...EXTENSIVE.
        Mc Squared System Design Group is
          "...focussed on the integration of the sound and video systems and the architectural environment the systems operate in..."
        For more information see JavaScript Features Page or Mc Squared System Design Group

          Some examples of over "16" Acoustics Calculators include

            Decibels and Distance Calculator
            Decibels and Distance Calculator
              "...will give you the amount of attenuation, in decibels, you can expect with a change in receiver distance, in a free field (outdoors)..."

            Quickie 2kHz Reverb Time Calculator
            Quickie 2kHz Reverb Time Calculator will
              "...give you a fast indication of how much trouble you may be in with your current room design. This is a simplified rectangular room in this calculation, and should only be considered a first order approximation to tell you what magnitude of acoustical problem you can expect..."

            Room Mode Calculator
            Room Mode Calculator
              "...will determine the Axial, Tangential and Oblique room modes of regular rectangular shaped rooms with uniform wall construction...This is especially useful in finding the optimum room shape for home theatre and listening rooms, studios, and practice rooms."

            The Speech Intelligibility Calculator
            Speech Intelligibility Calculators include
              "...Room Details Calculator;
              Speaker Details Calculator;
              Listener Details Calculator;
              Reverb Time Calculator;
              Critical Distance Calculator;
              Percentage Articulation Loss of Consonants (%ALCONS) Calculator..."

            Wavelength of Sound Calculator
            Wavelength of Sound Calculator
              "...will tell you the wavelength of any airborne audio frequency in inches, feet and metres, based on the speed of sound at sea level, and at 20 degrees Celsius or 72 degrees Farenheit. Note that with audio frequencies of 20Hz to 20,000Hz the range of physical sizes of wavelengths is substantial (1000:1), and this causes no end of problems with loudspeaker system design..."



        ACOUSTICS CALCULATORS FOR SPEAKER DESIGN - mhsoft, The Netherlands VERY VERY EXTENSIVE.
        Some examples from over "15" Acoustics Calculators for Speaker Designinclude:
          "...Room Modes Calculator;
          Reverb (RT60) Calculator;
          Amount of Standig Waves In A Rectangle Room Calculator;
          Absorber Calculators include
            Standing Waves for One Dimension Calculator;
            Resonant Frequency, Bandwidth and Q from given Volume, Port Length and Width Calculator;
            Frequency of Absorption of the Panel Absorber Calculator;
            Depth of the Panel Absorber Calculator;
            Mass of the Panel Calculator;
            Slot Helmholtz Resonator Calculator; etc..."
        For more information see HiFi Speaker Design



        AUDIO CALCULATORS - Eberhard Sengpiel, Germany Available in English & German/Deutsch. VERY VERY VERY...EXTENSIVE.
        Some examples from over "60" Audio Calculators include
          Conversion of Sound Units Calculator;
          Sound Pressure and Intensity Levels Calculator;
          Ohm's Law as Acoustic Equivalent for Plane Progressive Waves Calculator;
          Decibel Calculator;
          Reactance Calculator of C and L;
          Damping of bridging and damping factor Calculator;
          Reverberation Time <> Sound Decay Rate Calculator; etc.
        For more information see Forum für Mikrofonaufnahmetechnik und Tonstudiotechnik





      MUSIC ACOUSTICS & VIBRATIONS WITH ANIMATIONS, VIDEOS/MOVIES & AUDIO/SOUND

        ACOUSTICS ANIMATIONS & SIMULATIONS AND VIBRATION ANIMATIONS & SIMULATIONS

        FOR RELATED MUSIC ACOUSTICS & VIBRATIONS CALCULATORS SEE MUSIC CALCULATORS


        ACOUSTICS & VIBRATIONS (QUICKTIME) - D.A. Russell, Applied Physics, Department of Science & Mathematics, Kettering University, Flint, Michigan Multimedia Acoustics and Vibration Teaching Modules (Text, Images, Animations, Videos/Movies & Audio/Sound). VERY VERY VERY...EXTENSIVE.
        Acoustics & Vibrations Subject Categories include:
          "...Basic Wave Phenomena;
          Sound Waves and Radiation from Sources;
          Complicated Wave Phenomena;
          Room Acoustics;
          Vibration of 1-DOF Simple Oscillators;
          Vibration of Multi-DOF Systems; etc..."
        For more information see Daniel A. Russell's Home Page; Applied Physics; Department of Science & Mathematics or Kettering University

          Some examples from over "50" Acoustics and Vibration Teaching Modules include

            Modal Analysis of an Electric Guitar
            Modal Analysis of an Electric Guitar
              "...The purpose of this experiment was two-fold:
                familiarize ourselves with the process of experimental modal analysis, including learning how to use the hardware and software;
                to study the vibration of an electric guitar in order to determine its natural frequencies and mode shapes..."

            Refraction of Sound Waves
            Refraction of Sound Waves
              "...Suppose you are camping on the shore of a lake which is not too wide, maybe 1/2 a mile across or so. During the day you can see campers on the other side of the lake, but you cannot hear them. At night, however, you can not only see the campers on the other side of the lake but you can also hear their conversations as they sit around their camp fire. This phenomena is due to the refraction of sound waves..."

            Sound Fields Radiated by Simple Sources
            Sound Fields Radiated by Simple Sources include
              "...Radiation from a monopole source;
              Radiation from a dipole source;
              Radiation from a lateral quadrupole source..."

            Acoustics of Baseball Bats
            Acoustics of Baseball Bats
              "...vibrational and acoustic analysis of softball and baseball bats has become my primary area of research. I have been able to correlate the vibrational frequencies of bat barrels to measured performance, and have signicantly contributed to an understanding of the trampoline effect in a hollow bat. In addition, my vibrational analysis of the bending modes of a bat has added to the understanding of perception and feel, including why some bats sting more or less than others..."



        MUSIC ACOUSTICS (FLASH, QUICKTIME, REALPLAYER) - J. Wolfe, Music Acoustics Group, Department of Environmental and Applied Physics, School of Physics, University of New South Wales, Sydney, Australia Multimedia Music Acoustics Course, Teaching Modules (Text, Images, Animations, Videos/Movies & Audio/Sound). VERY VERY VERY...EXTENSIVE.
        Music Acoustics Subject Categories include:
          "...Musical Acoustics Basics;
          Flute Acoustics;
          Clarinet Acoustics;
          Saxophone Acoustics;
          Brass Acoustics;
          Didjeridu Acoustics;
          Violin Acoustics;
          Guitar Acoustics;
          Voice Acoustics; etc..."
        For more information see Joe Wolfe's Music Home Page; Joe Wolfe's Home Page or the School of Physics

          Some examples from over "150" Music Acoustics Teaching Modules include

            Test your Hearing
            Test your Hearing
              "...This site allows you to measure equal loudness contours--the frequency response of your own ears. The flash script allows you to play sound files with a range of frequencies and sound levels with the click of a mouse..."
              "...Results using this test cannot be regarded as clinical data. Although the sound files have been carefully prepared, the actual sound level and spectral purity depend on the frequency response of your sound card and headphones. They may, however, be helpful for comparison, such as left vs right ear, or for changes in hearing over time, assuming that you use the same hardware..."

            What is a Sound Spectrum?
            Sound Spectrum
              "...is a representation of a sound - usually a short sample of a sound - in terms of the amount of vibration at each individual frequency. It is usually presented as a..."

            Saxophone Acoustics
            Saxophone Acoustics
              "...In the saxophone, the reed acts like an oscillating valve (technically, a control oscillator). The reed, in cooperation with the resonances in the air in the instrument, produces an oscillating component of both flow and pressure. Once the air in the saxophone is vibrating, some of the energy is radiated as sound out of the bell and any open holes..."

            Flute Acoustics
            Flute Acoustics
              "...In the flute, the air jet, in cooperation with the resonances in the air in the instrument, produces an oscillating component of the flow. Once the air in the flute is vibrating, some of the energy is radiated as sound out of the end and any open holes..."





      ROOM ACOUSTICS CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS

        ROOM EIGENMODES CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS

        REVERBERATION TIME CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS

        ROOM ACOUSTICS CALCULATOR (JAVA APPLET) - Hunecke Consult, Germany VERY VERY VERY...EXTENSIVE.
        Available in English, Dutch/Nederlands, French/Français, German/Deutsch & Polish.
        Room Acoustics Calculator
          "...enables you to design the acoustics of a room according to DIN 18041 and ÖNORM B 8115-3. After the usage and the appropriate standard have been selected the calculator derives the relevant design quantities, tolerance ranges or limits, and the corresponding state of the room (furnished, unfurnished, occupied or unoccupied)..."
        Room Acoustics Calculator INPUT Values include:
          Room Usage
            "...Auditorium, Sports Hall, Class Room,
            Rehearsal Room, Film Theater, Office, Airport, Museum, etc..."
          Shape of Room
            "...Length, Width, Height, Volume..."
          Bare Ceiling;
          Bare Floor;
          Floor Coverings;
          Walls;
          Windows;
          Furniture for:
            "...Workplaces, Bar, Lounge, Restaurant, Musicians, Spectators, etc..."
          Abosrbers; etc.
        For more information see Calculators; English Index or Hunecke Consult



        ROOM EIGENMODES CALCULATOR (JAVA APPLET) - Hunecke Consult, Germany VERY VERY EXTENSIVE.
        Available in English, Dutch/Nederlands, French/Français, German/Deutsch & Polish.
        Room Eigenmodes
          "...determines the room eigenmodes with the 20 lowest eigenfrequencies for rectangular rooms and presents them in ascending order. To distinguish between the different eigenmodes they are designated by a combination of three natural numbers. In the calculator they are listed in..."
        Room Eigenmodes Calculator INPUT Values include:
          "...Room (Width, Length, Height) & Frequency..."
        For more information see Calculators; English Index or Hunecke Consult



        RT60 ACOUSTICS CALCULATOR - TSC/Trinity Sound Company VERY VERY EXTENSIVE.
        RT60 Acoustics Calculator
          "...is an acoustical measurement used to calculate reverb time decay. What RT60 really is in simple terms is the measurement of time it takes a signal to fall -60db..."
        Acoustics Calculator INPUT Values include:
          Room Size
            "...Length, Width, Height..."
          Front, Back, Left & Right Walls Materials
            "...Concrete, Brick, Marble, Plaster on Lath, Plywood Paneling, Wood, Terrazzo, Tile, etc..."
          Windows, Doors and other Surfaces
            "...Drapery, Glass, etc..."
          Ceiling Materials
            "...Suspended Tile, Plaster on Lath, etc..."
          Floor Materials
            "...Concrete, Brick, Marble, Wood, Terrazzo, Tile, Seating, Audience in Seats, etc..."
          Hertz (Hz)
            "...125 Hz, 250 Hz, 500 Hz, 1000 Hz, 2000 Hz or 4000 Hz..."
        For more information see Tech Talk or TSC/Trinity Sound Company





    Microphone Design


      MICROPHONE CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS

        MICROPHONE SENSITIVITY CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS

        MICROPHONE CALCULATORS - Eberhard Sengpiel, Germany Available in English & German/Deutsch. VERY EXTENSIVE.
        Microphones
          "...Forget the power ratings. They have no relevance to microphones. The term "dB SPL" is a measurement of Sound "Pressure" Level (SPL) which is the force per area that acoustical sound waves apply to air particles. Microphones are sensors in the soundfield which deliver an analogous voltage. Microphones measure sound pressure, or..."
        Microphone Calculators include
          Microphone Sensitivity Calculator INPUT Values include
            "...Sensitivity; Transfer Factor..."
          Microphone Dynamic Range Calculator INPUT Values include
            "...Maximum SPL; Self noise; Dynamic range; S/N ratio re 94 dB SPL..."
        For more information see Audio Calculations or Forum für Mikrofonaufnahmetechnik und Tonstudiotechnik





    Speaker Design


      SPEAKER DESIGN CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS



      CIRCUIT, BOX & SPEAKER DESIGN CALCULATORS & APPLETS

        AUDIO SPEAKER DESIGN CALCULATORS - KBápps.com VERY VERY VERY...EXTENSIVE.
        Audio Speaker Design
          "...To design the enclosure and crossover circuit for optimum performance of a speaker system, one must know the parameters of the driver. From those measurements, the enclosure and port dimensions can be calculated and system performance analyzed..."
        Some examples from over "20" Audio Speaker Design Calculators include
          "...Parameters of a Driver Calculator;
          Sealed Enclosure Systems Calculators include
            Single Driver Enclosure Calculator;
            Dual Driver Enclosure Calculator;
            4 x 4 Stack Calculator.
          Vented Enclosure Systems Calculators include
            Single Driver Enclosure Calculator;
            Dual Driver Enclosure Calculator;
            3 way Enclosure Calculator.
          Vented Enclosure Calculator; etc..."
        For more information see Audio Speaker Design or KBápps.com



        AUDIO SPEAKER BOX DESIGN CALCULATORS & TEACHING MODULES - M. LaLena Multimedia Speaker Design Teaching Modules & Calculators (Text & Images). VERY VERY VERY...EXTENSIVE.
        Speaker Design
          "...you can get great sounding speakers at a low price. Granted, you won't achieve the quality of a $10,000 speaker, but for a couple hundred dollars, you can build speakers that will sound much better than anything you can buy at that price..."
        Examples of Speaker Design Teaching Modules include
          "...Speaker Box Construction;
          Speaker Wiring;
          Home Theater Speakers; etc..."
        LaLena's Speaker Design Calculators include:
          "...Speaker Box Designer Calculator;
          2-way Crossover Designer Calculator;
          3-way APC Crossover Designer Calculator;
          Series Notch Filter Calculator;
          Parallel Notch Filter Calculator;
          Driver Attenuation Circuit Design Calculator;
          Inductor Designer Calculator; etc...."
        For more information see Michael LaLena's Home Page

          Some examples from over "8" Audio Calculators include

            Speaker Box Designer
            Speaker Box Designer Calculator INPUT Values include
              "...Equivalent Volume; Free Air Resonance; Total Q; Effective Cone Diameter; etc..."

            Series Notch Filter Designer
            Series Notch Fliter Designer Calculator INPUT Values include
              "...Driver DC Resistance; Driver Free Air Resonance; Driver Electrical Q; etc..."

            Impedance Equalization Circuit Designer
            Impedance Equalization Circuit Designer Calculator INPUT Values include
              "...Driver DC Resistance; Driver Inductance..."



        SPEAKER DESIGN CALCULATORS & TEACHING MODULES - Ishtek Multimedia Speaker Design Teaching Modules & Calculators (Text & Images). VERY VERY EXTENSIVE.
        Speaker Design Calculator
          "...The speaker design program which you can access via this page uses Thiele-Small parameters for a speaker, and allows you to calculate various designs. The two primary style of speaker designs handled by the program are horn-loaded cabinets and vented cabinets..."
        For more information see Speaker Design Page or ISHTEK



        SPEAKER DESIGN CALCULATORS - mhsoft, The Netherlands VERY VERY VERY...EXTENSIVE.
        Some examples from over "30" Speaker Design Calculators include:
          "...Sealed Box Calculator;
          Ported Box Calculator;
          Transmission Line Length (TML) Calculator;
          Sixth-Order Bandpass Subwoofer Calculator;
          Port Calculator;
          Frequency Response Calculator;
          T-S Parameter (TSP) Calculator;
          Impedance Equalization Circuit Calculator;
          Driver Reference Efficiency Calculator;
          Crossover Design (Butterworth, Linkwitz-Riley or Bessel) Calculator;
          Power Calculator;
          DC Voltage Divider Calculator; etc..."
        For more information see HiFi Speaker Design





      CROSSOVER CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS

        CROSSOVER CALCULATORS - Select Products VERY EXTENSIVE.
        Crossover Calculators
          "...For the ultimate in passive crossover performance, you need to build a crossover that is matched to your speakers..."
        Crossover Calculators include:
          Crossover Parts Calculator INPUT Values include
            "...Impedance & Crossover Frequency for 1st Order (6dB per Octave);
            2nd Order (12dB per Octave) and 3rd Order (18dB per Octave)..."
          Narrow Band Pass Calculator INPUT Values include
            "...Impedance, High Pass Frequency & Low Pass Frequency for 1st Order (6dB per Octave) Narrow Band Pass;
            2nd Order (12dB per Octave) Narrow Band Pass;
            3rd Order (18dB per Octave) Narrow Band Pass..."
          Zobel Networks Calculator INPUT Values include
            "...Nominal Impedance; Frequency Impedance Doubles..."
        For more information see Select Products





      CAR SPEAKER DESIGN CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS

        CAR AUDIO DESIGN - Online Connections Inc. Multimedia Car Audio Design Calculators & Teaching Modules (Text & Images). VERY VERY VERY...EXTENSIVE.
        Examples of Car Audio Design Teaching Modules Subject Categories include
          "...Box Design Teaching Modules;
          Amplifiers Teaching Modules;
          Basic Electrical Teaching Modules;
          Car Audio Basics Teaching Modules;
          Crossovers & Filter Teaching Modules;
          Equalizers Teaching Modules;
          Installation and Wiring Teaching Modules; etc..."
        Some examples from over "20" Car Audio Design Calculators include:
          Box Design Calculators;
            "...Fourth-Order Bandpass Subwoofer Box Design Calculator;
            Box Dimensions Calculator & Solid Object Volume Calculator;
            Sixth-Order Bandpass Subwoofer Enclosure Design Calculator;
            Vent Dimensions Calculator;
            Sealed Subwoofer Box Design Calculator - Sealed Speaker Enclosure Design Calculator;
            Subwoofer Box Dimension Calculator; etc..."
          Basic Electrical Calculators include
            "...Ohm's Law Calculator (Current) - Electrical Current Calculations;
            Ohm's Law Calculator (Impedance/Resistance) - Impedance/Resistance Calculations; etc..."
          Crossovers & Filter Calculators include
            "...Crossover Network Design Formulas & Calculator;
            6th Order Linkwitz-Riley Crossover Network Design Formulas & Calculator;
            4th Order Linkwitz-Riley Crossover Network Design Formulas & Calculator;
            Butterworth 2nd Order Crossover Network Design Formulas & Calculator; etc..."
          Speaker Calculators include
            "...Loudspeaker Efficiency Calculator; etc..."
        For more information see Obsession Audio





      HORN SPEAKER DESIGN CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS



      LOUDSPEAKER DESIGN CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS



Calculators On-Line Center, Part I:F-H

Calculators On-Line Center ~ Home Page


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