Tools to be built

DONE = green (red for some) - see www.dogbarkstageleft.com/soundtools

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AWG to mm²
pop-up to convert AWG to cross-sectional area in mm²

Power relationship in dB
=10*log10(watt2/watt1)

Speed of Sound
milliseconds to meters(feet) [ms*speed of sound in ms (1.125ft/ms or 0.343m/ms)]
meters(feet) to milliseconds [distance/speed of sound in ms (1.125ft/ms or 0.343m/ms)]

Delay
(talker distance-speaker distance)/speed of sound

Volts to dBu
=20*log10(volts/0.775)
vol.value=20*Math.log(volt.value/0.7746)*Math.LOG10E;

dBu to Volts
=0.775*(10^(dBuin/20))
volt.value=Math.pow(10, (dBu.value/20))*0.7746; USED THIS

Level Drop over distance
dbLoss=20*log10(distance)
=dB@1m-dBloss
=20*Math.log(distance)*Math.LOG10E;

System Design
target SPL
distance
Level drop = 20*log10(distance)=20*Math.log(distance)*Math.LOG10E;
headroom
Overall SPL = TargetSPL + leveldrop + Headroom
no of speakers
peak SPL per spkr = overall SPL-(log10(no of sprk)*10)

Cable size & damping factor
cable length
conductor size in mm (AWG to mm converter?)
total load imp.
cable res. = (0.018*cable length*2)/conductor size
damping factor = load imp/cable res.
db loss = 20*log(load imp./(load imp. + cable res.))

Frequency & Wavelength
wavelength in m & ft
cancellation dist. = wavelength/2
frequency = speed of sound/wavelength
frequency in Hz
wavelength = speed of sound/frequency
1/2 wavelength = wavelength*0.5
1/4 wavelength = wavelength*0.25
time in ms (1 cycle) = 1/4 wavelength/ speed of sound in ms

Cluster height calc
distance from x to y under cluster = D
angle cluster above horz.
operator height (eye) = h
cluster height = D*(tan((angle*PI)/180))+h

tiered seating height calc
distance up seats = D
angle in degrees
operator height = opH
stage height = stgH
vertical height = D*(sin(angle*PI/180))+opH+stgH

Combining Subs
SUB o/p
no. of SUB
result level = 20*log10(no. of SUB*(10^(sub out/20)))
distance = D
level drop = 20*log10(D)
actual level = result level-level drop
headroom
actual level = actual level-headroom

MAX SPL
sensitivity 1w/1m
max power handling w
Max SPL = 10*log10(max power/1)+sensitivity

addition of unequal dB
level 1
level 2
resultant level = 10*log10(10^(level 1/10)+(10^(level 2/10)))

Combined impedance
no. of spkr
impedance
total imp. = 1/((1/impedance)*no of spkr)

Voltage relationship in dB
=20*log10(Vout/Vin)

Low Priority / Need more Education in JS

Build isobar (graph)

phase angle (graph)

Atmospheric Absorption over the Distance (graph)

What else???