Decibel's ( db ) are units of ratio's and in this table are expressed in atmospheric decibels and in this table are REPRESENTATIVE OF THE OBJECT (N), and not neccesarily what the listener or sound level meter experiences (P).
(N) = NORMALIZED TOTAL AIR POWER ENERGY LEVEL SOUND PLUS ANY WIND, WATTS OR JOULES PER SECOND.THESE LEVELS HAVE BEEN CONVERTED
(P) = ACTUAL PEAK PRESSURE METER READINGS i.e. A FORCE PER UNIT AREA
(NP) = NORMALIZED PRESSURE USED IN EXPLOSIVE MEASUREMENTS, BLAST WIND IS NOT INCLUDED
(Q) = BLAST WIND DYNAMIC PRESSURE CREATED BY THE PEAK SHOCK FRONT OVERPRESSURE (P)
REF. = REFERENCE NUMBER OF DATA SOURCE AND YEAR IN APPENDIX BELOW
DECIBEL LEVEL (N = NORMALIZED)( P = ACTUAL PRESSURE) (NP = BOMB PRESSURE) CAUSE OR EFFECT
-30 (N) ONE HUMAN TALKING 20 MILES AWAY ( 60 DB / METER AT A DISTANCE OF 20 MILES )-REF.1.2003 -4 TO +4 (N) THE TICKING OF AN ORDINARY WRISTWATCH AT 1 METER -REF.1 2003 0 (N) BEGINNING OF HEARING, A MOSQUITO 10 FEET AWAY, THE EAR DRUM MOVES LESS -REF.1.1990 THAN 1 / 100 THE LENGTH OF AN AIR MOLECULE (N) 3.5 (P) 1E-10 METERS OF MERCURY = 0.0000000001 METERS OF MERCURY 10 (P) ABSOLUTE SILENCE, ATT-BELL LABORATORY " QUIET ROOM " 13 (P) ORDINARY LIGHT BULB HUM 15 (N) A PIN DROP FROM A HIEGHT OF 1 CENTIMETER AT A DISTANCE OF 1 METER -REF.1.2003 30 (P) TOTALLY QUIET NIGHTIME IN DESERT-IMPOSSIBLE ANYWHERE NEAR CITY 35 (P) ANECHOIC HEARING TEST ROOM -REF.1. 1998 40 A WHISPER, A NORMAL CONVERSATION IS 60 DB, NORMAL SOUND 70 DB -REF.1.1983 73.98(P) = 1 uBAR = 1 microbar pressure 85 BEGINNING OF HEARING DAMAGE, EARPLUGS SHOULD BE WORN 93.98(P) = 1 PASCAL PRESSURE 100 NORMAL AVERAGE CAR OR HOUSE STEREO AT MAXIMUM VOLUME -REF.1.1982 107-104 (P) THE BEGINNING OF PAIN AT THE MOST SENSITIVE FREQUENCY OF 2750 HERTZ -REF.1.1982 109 ONE SOUND WATT RADIATING AS A PERFECT SPHERE, 4 PI SQUARE METERS -REF.1. 1986 110 A CAR STEREO WITH TWO 6 X 9" SPEAKERS AND 100 WATTS -REF.1.1982 113.81(P) = 1 MILLIMETER WATER 114-107 A VERY LARGE, POWERFUL PORTABLE RADIO REF.1.1982 116 HUMAN BODY BEGINS TO PERCIEVE VIBRATION IN THE LOW FREQUENCIES -REF.1.1986 117-123 HOME STEREO SYSTEM, A VERY LOUD AND POWERFUL 200-2000 WATTS -REF.1.1983 120.24(P) ONE PURE SOUND WATT FLOWING THROUGH 1 SQUARE METER, YOUR ELECTRIC AMPLIFIER MAY BE 3000 WATTS.ALSO A TESTIMONY TO HEARING SENSITIVITY -REF.1.1986 120-130 FRONT ROW AT A ROCK CONCERT- UP TO 200 REFRIGERATOR SIZE SPEAKERS AND 50000-300000 WATTS OF CLEAN, FULL FREQUENCY SOUND -REF.1.1981 125 DRUM SET-ONLY AT THE MOMENT OF STRIKING, CONTINOUS LEVEL 115 126-130 TYPICAL PROFESSIONAL D.J. SYSTEM -REF.1.1984 127 HUMAN TINNITUS (RINGING IN THE EARS) BEGINS -REF.1.1984 127.48 = 1 pound per square foot 128 (P)HUMAN, LOUDEST SCREAM MEASURED AT A DISTANCE OF 8 FEET 2 INCHES 128 HUMAN HEAD HAIR BEGINS TO DETECT VIBRATION -REF.1.1983 128 HUMAN CAN BEGIN TO DETECT VERY SLOW "BLAST WIND" OF 0.124 METERS/SECOND -REF.1.1983 130 (N)MARCHING BAND-OVERALL LEVEL AT A DISTANCE, 100-200 MEMBERS -REF.1.1996 132 EARDRUM "FLEX" TOTALLY NOTICEABLE -REF.1.1982 132.4(P) = 1 SOUND WATT MAXIMUM IN A SMALL SEALED BOX BELOW HYDRODYNAMIC CRITICAL LOW FREQUENCY 133 (N)GUNSHOT- EAR LEVEL, MAY VARY GREATLY TO SIZE AND TYPE OF GUN, DURATION CONVERTED TO ONE SECOND, PEAK LEVEL MAY REACH 140-160 (P) 133.98 (P) = 1 MILLIBAR PRESSURE 135-122 (P) "VERY LOUD" CAR STEREO, ONLY BASS LEVEL, HIGHS RARELY ABOVE 115(P) -REF.1.1983 135-130(N) LARGE TRAIN HORN -REF.1.1985 135 HUMAN, A SLIGHT COOLING EFFECT BEGINS TO BE NOTICED, FROM AIR EXPANSION -REF.1.1983 136.498(P) = 1 TORR PRESSURE = 1 MILLIMETER MERCURY 137 HUMAN BODY VIBRATION IS STRONG -REF.1.1983 137-140 HUMAN EAR ALL FREQUENCIES ARE PAINFUL -REF.1.1983 140 EXTREMELY DAMAGING TO HEARING NO MATTER HOW SHORT THE TIME EXPOSURE 140 BLAST WIND = U = (PARTICLE VELOCITY) IS 0.49 METERS PER SECOND OR ABOUT 1 MPH 140 HUMAN THROAT AND VOCAL CORD VIBRATION BEGINS -REF.1.1983 141 HUMAN BODY BEGINS TO FEEL NASUEA AFTER A FEW MINUTES -REF.1.1983 141.918(P) = 1 INCH OF WATER PRESSURE 142 HUMAN BODY CHESTPOUNDING IS INTENCE -REF.1.1983 142 (P) INSIDE A CAR WITH TWO PRO 18 INCH WOOFERS AND 300 WATTS EACH -REF.1.1983 143 HUMAN BODY FEELS AS IF SOMEONE JUST FOOTBALL TACKLED YOUR CHEST -REF.1.1983 144 HUMAN NOSE ITCHES -REF.1.1983 145 HUMAN VISION BEGINS TO VIBRATE MAKING IT SLIGHTLY BLURRY, 1-3 DEGREES -REF.1.1983 145-136 (P)"COMPETITION" CAR STEREO, SIXTEEN 12 OR EIGHT 15, OR FOUR 18 SPEAKERS -REF.1.1983 146.1(P) AIR PARTICLE VELOCITY(WIND) IS 1 METER PER SECOND OR ABOUT 2 MILES PER HOUR 147 (N)FORMULA 1 RACE CAR, 700 HORSEPOWER, CHESTPOUNDING AND SUCTION FORCE ON CALM QUIET MORNINGS CAN CLEARLY BE HEARD 6 MILES AWAY.-REF.1.1991 148 HUMAN VIBRATION VERY UNCOMFORTABLE AND SLIGHTLY PAINFUL -REF.1.1986 149 HUMAN LUNGS AND BREATHING BEGINS VIBRATING TO THE SOUND -REF.1.1986 150 (N)ROCK CONCERT "THE WHO" TWO 10 STORY STACKS = 144 DOUBLE REFRIDGERATOR SIZED SPEAKERS, ACTUAL LEVEL REACHED 120 DB AT A DISTANCE OF 32 METERS FOR THIS NORMALIZED READING OF 150 DB.CONTINOUS LEVEL 114-118db (P) AT 32 METERS -REF.1.1982 150 ROCK CONCERT SPEAKER AT 1600 WATTS ON THE ACTUAL VIBRATING SURFACE -REF.1.1991 150 HUMAN SENSATION OF BEING COMPRESSED AS IF UNDERWATER IS OVERWHELMING -REF.1.1983 150 HUMAN SOUND EXPERIMENTS DOWN TO 1 TO 2 HERTZ - REF.13. 152 HUMAN VIBRATION IS PAINUL AND ALSO FELT IN ALL JOINTS -REF.1.1983 153 HUMAN THROAT IS VIBRATING SO HARD IT IS ALMOST IMPOSSIBLE TO SWALLOW -REF.1.1983 154 TOY BALLOON POPPING, DEPENDS ON TYPE AND HOW LARGE AND HARD TO INFLATE -REF.1.1986 155 HUMAN BODY COMPRESSION AND EXPANSION TO VIBRATION IS TO THE "CORE" -REF.1.1983 155 HUMAN COOLING EFFECT IS HIGH, AS A GUESS 10 TO 25 DEGREES FARENHEIT? -REF.1.1983 156 (P)IN A MINI-VAN WITH TWENTY 12" WOOFERS AND 19,000 WATTS OF AMPLIFIER POWER. EACH SPEAKERS IS DISPLACING (PUMPING BACK AND FORTH ) 0.75 INCHES IF LONG HAIR WOMEN SIT IN IT, HER HAIR WILL FLY OUT OF WINDOW WITH BASS WINDSHIELD WIPERS FLY OFF VEHICLE 1/2 TO 2 INCHES, DOOR AND FRONT WINDSHIELD FLEXION MAY BE UP TO +-2 INCHES OR 4 INCHES PEAK TO PEAK EVEN WITH EARPLUGS (-30 DB) AND HEADMUFFS (-24 DB) = -54 DB IT'S STILL LOUD -REF.1.1997 156.498(P) = 1 CENTIMETER MERCURY = 0.01 METERS MERCURY 158 HUMAN BODY VIBRATION IS VIOLENT, NAUSEA BECOMES MORE INTENCE -REF.1.1983 158 (P)INSIDE A ROCK CONCERT SPEAKER BOX REFRIDGERATOR SIZE AT MAX. 5000 WATTS -REF.1.1983 160 (P)FLASHLIGHTS EXHIBIT ELECTROMAGNETIC PULSING-EMP (DIMMING DURING SOUND) -REF.1.1983 162 U.S. FESTIVAL ROCK CONCERT 1983. 10 SEPARATE STACKS, AMPS = 400,000 WATTS (N) -REF.1.1983,-REF.3. 163-153 (N) N.H.R.A. DRAGSTERS- 5000 TO 7000 HORSEPOWER, LIQUID NITROGLYCERIN FUEL, EARTHSHAKING AT 50 FEET, HUMANS FIND IT HARD TO SEE, AND BREATHE 140db(P) -REF.1.1987 163 (P)GLASSBREAKING LEVEL, MINIMUM, IT IS VERY HARD TO BREAK GLASS WINDOWS. MANY STORIES COME FROM BREAKING GLASS BUT IT IS HIGHLY VARIABLE: IT IS EASIER TO BREAK IF THE WINDOW ALREADY HAS A CRACK, IS VERY LARGE OR OLD AND BRITTLE AND NOT CAR SAFETY GLASS WHICH CAN FLEX MASSIVELY BEFORE BREAKING. AN OPERA SINGER AT 110 DB MAY BREAK A WINEGLASS BUT IT IS AN EXAMPLE OF FREQUENCY RESONANCE, AND NOT HIGH SOUND DB LEVEL -REF.1.1987 163 (N)OCEAN WHALE REFERENCE 2 EXP-5 NEWTONS PER SQUARE METER 164 (P)INTERNAL SOUND PRESSURE OF A LARGE JET AIRPLANE TURBINE MOTOR -REF.1.1993 164.568(P) = 1 INCH MERCURY PRESSURE 165-145 (NP) THE COMMON TYPE OF FIREWORKS AT PROFESSIONAL PYROTECHNIC SHOWS -REF.1.1988 165 (N)JET AIRPLANE, BOEING 727-15,000 LBS OF THRUST, DEPENDS ON THE TAKEOFF -REF.1.1982 165(P) MOTOR DRIVEN PISTON HEADPHONES -REF.16. 166 AIR PARTICLE VELOCITY IS 10 METERS PER SECOND OR ABOUT 20 MILES PER HOUR 170.75 PRESSURE (P) = 1 P.S.I. = 1 POUND PER SQUARE INCH MOST SOUND READINGS HIGHER THAN THIS REFER TO P.S.I. INSTEAD OF DB. BUILDINGS AND HOUSES HAVE APPROXIMATELY A 50 % CHANCE OF SURVIVAL REF.2. 171-150 (P)WORLDS LOUDEST CAR STEREOS, UP TO 80 SPEAKERS,32 CAR BATTERYS, 100,000 WATTS, 125-138 (N) 171(P) acoustic air pressure generator -ref.12 172 (N) 727, 737, 747, 757, 767 CRUSING AT 6 MILES HIGH MACH 0.84, AT THE GROUND (SEA LEVEL) LOSES AN ADDITIONAL 6 DB BECAUSE AIR DENCITY IS ONLY HALF SEA LEVEL AT A HIEGHT OF 6 MILES 172 FOG IS CREATED, DEPENDING ON THE TEMPERATURE, DEW POINT AND HUMIDITY 173-164 (P)BASS INJECTION TESTS, EXPIERIMENTAL ELECTROMAGNETIC TYPE SPEAKERS -REF.1.1987 173(P) = hydraulic, whole body dynamic pressure chamber, at 8 hertz -ref.11. 174 AIR BEGINS TO HEAT UP DUE TO COMPRESSION, MOST SHOCK WAVES ARE VERY HOT 174(P) LOUDSPEAKER COUPLED MANOMETER HEADPHONES DOWN TO 1 HERTZ -REF.15. 175 (N) QUARTER DYNAMITE STICK, VERY CLOSE PRESSURE MAY EXCEED 210 db (P) 175.8(P) 1 TON T.N.T. AT 250 FEET 177 (P) = 2 P.S.I., DAMAGE TO STRUCTURES ARE SIGNIFICANT, 30% SURVIVAL -REF.2. 180 (P) 1 POUND T.N.T. AT 15 FEET -REF.4. 180 (P) = 3 P.S.I., DAMAGE TO STRUCTURES IS CATASTROPHIC, WHEN A SHOCK -REF.2. WAVE HITS A STRUCTURE ITS MOMENTUM AND PRESSURE MORE THAN DOUBLES, ESPECIALLY AT HIGHER DB LEVELS, DYNAMIC WIND IS ABOUT 103 MILE / HOUR AND CAUSES A LARGE PORTION OF DAMAGE, 15 % OBJECT SURVIVAL -REF.2. 180 (P) = MOTOR DRIVE COUPLED MANOMETER STATIC PRESSURE, 165 DB(P) UP TO 50 HERTZ, -REF.14. 182 (P) 1 TON T.N.T AT 150 FEET, EXACTLY 182.2 DB -REF.4. 183 (P) = 6 P.S.I. TOTAL DESTRUCTION OF ALL STRUCTURES, PARTICLE VELOCITY (BLAST WIND) IS 180 MILES PER HOUR. 0.9 MILES FROM HIROSHIMA ATOMIC BOMB AND 3.3 MILES FROM 1MEGATON NUCLEAR BOMB, LESS 0.1 % OBJECT SURVIVAL -REF.2. 185.75 (NP) 0.375 POUNDS OF T.N.T. RIECHTER -1.5 186.1(P) 1 POUND T.N.T AT DISTANCE OF 10 FEET -REF.4. 187 (P) 1 TON T.N.T. AT 100 FEET, EXACTLY 186.8 DB -REF.4. 190.60 (NP) RIECHTER SCALE 0 (ZERO) EARTHQUAKE 190.60 (NP) 2.0000 POUNDS T.N.T. 191 (N)BOMB-VERY SMALL 1 LB. OR GRENADE, VERY CLOSE PRESSURE MAY EXCEED 210 db (P) 193.806(P) = 1 KILOGRAM PER SQUARE CENTIMETER 193.979(P) = 1 BAR PRESSURE = 14.504 POUNDS PER SQUARE INCH = 14.504 P.S.I. 194.09(P) = 1 (ONE) AIR ATMOSPHERE = 14.6962 POUNDS PER SQUARE INCH = 14.6962 P.S.I.= 1 ATM SOUND WAVES DISTORT AND ARE NOW DEFINED AS SHOCK WAVES AND THEY BEGIN TO FOLLOW SHOCK WAVE BEHAVIOR. PARTICLE VELOCITY (BLAST WIND) = 590 FEET / SECOND = 180 METERS PER SECOND = 402 MILES PER HOUR. -REF.2. 194.1(P)EXACTLY, 1 POUND T.N.T. AT 6 FEET -REF.4. 195-190 (P) HUMAN EARDRUMS RUPTURE 50 % OF TIME -REF.2. 195.2(P) 1 TON T.N.T. AT 60 FEET -REF.4. 200.59 (NP) 63.24 POUNDS OF T.N.T., RIECHTER SCALE 1 202-198 (P) HUMAN DEATH FROM SOUND (SHOCK) WAVE ALONE. DEATH FROM: SCHRAPNEL AT ANY LEVEL ABOVE 165 DB IS LIKELY AND BEING THROWN (10 FEET PER SECOND) ABOVE 180 DB -REF.2. 205.29(NP) 320 POUNDS OF T.N.T. RIECHTER 1.5 207 (N)BOMB, SMALL SIZED 250 POUNDS, 14 FOOT WIDE CRATER, NEARBY MAY EXCEED 238 db (P) -REF.2. 207.46 (P) = 68.48 P.S.I.= (Q), CRITICAL PRESSURE, THE SHOCK WAVE PRESSURE(P) AND DYNAMIC (BLAST WIND) PRESSURE(Q) ARE EQUAL, LOUDER THAN THIS DYNAMIC PRESSURE(Q) WILL ALWAYS BE MORE THAN SHOCK PRESSURE(P). BLAST WIND (PARTICLE VELOCITY = U) IS 1697 FEET PER SECOND = 518 METERS SECOND = 1157 MILES PER HOUR. 400 FEET FROM A 1000 TON T.N.T EXPLOSION -REF.2. 209 (N)BOMB, MEDIUM 500 POUNDS, 18 FOOT WIDE CRATER NEARBY MAY EXCEED 240 db (P) -REF.2.4. 210 N.A.S.A. 400,000 ACOUSTIC WATTS EXPIERIMENTAL NOISEMAKER 48 FEET ACROSS OF CONCRETE AND STEEL 210.6 (NP) EARTHQUAKE REICHTER SCALE 2.0 210.6 (NP) 1 TON OF T.N.T. and a 23.40 foot crater 212 (N) SONIC BOOM AVERAGE FROM JET -REF.5. 213 (N) SONIC BOOM GENERATES APPROXIMATELY 1.2 GIGAWATTS OR 1.6 MILLION HORSEPOWER -REF.1.2002 213 (N) BOMB 1 TON TNT, 23 FOOT WIDE CRATER OR 175.8 db (P) AT 250 FEET. 213.44 EXACT -REF.1.2.4. 214.09(P) = 10 atmospheres, DB(Q) BLAST WIND = 217.439 DB(Q) 215 SPACE SHUTTLE LAUNCH EXHAUST, APPROXIMATELY 3 MILES PER SECOND 215 (N)THUNDER, THE LARGEST POSITIVE GIANTS. ORDINARY THUNDER 165-180 DB.LIGHTNING STRIKE ON OCEAN SURFACE 234db (P) AT 2exp-5 NEWTONS PER SQUARE METER 215 (N) BATTLESHIP NEW JERSEY FIRING ALL 9 SIXTEEN INCH GUNS 216 (P) INSIDE A NORMAL CAR ENGINE CYLINDER WITH A 9 TO 1 COMPRESSION RATIO 216.0 (NP)+-0.3 DB 6.5 TONS OF T.N.T. EXACT EXTREMELY ACCURATE HIGH TECH MEASUREMENTS -REF. 8 217.439(Q) = DYNAMIC PRESSURE BLAST WIND FROM A 10 ATMOSPHERE OVERPRESSURE 218.2(NP)sonic boom F-16. at 100 feet high = 3.92 lbs.per square foot = 139.6db, +78.6db = 8536.5 meters high -REF.1.10. 2002 220 ?(N)BOMB, LARGEST USED IN WWII, WIEGHING 11 TONS AND 25 FEET LONG -REF.1.3. 2001 220 (N)SATURN 5 ROCKETSHIP, MELTS CONCRETE AND BURNS GRASS ONE MILE AWAY REACHED A VELOCITY OF 5 MILES PER SECOND AND MOON ON JULY 20, 1969 220 ?(N)SPACE SHUTTLE LANDING SONIC BOOM WITH VELOCITY OF MACH 20 -REF.1. 1998 225 (P) INSIDE A NORMAL DIESEL MOTOR SEMI-TRUCK CYLINDER 25 TO 1 COMPRESSION 226.59 (NP) TRAIN EXPLOSION 2004 FEB 19 09:37AM NEYSHABUR, IRAN, runaway train, possible terrorism, shattered windows at 15 km.,crater is 500 feet diameter and 50 feet deep, magnitude 3.6 riechter, at several miles "the entire area shook", heard at 75 km, equal to 251.195 tons of t.n.t., 51 car train = 17 cars sulpher, 6 cars gasoline, 7 cars ammonium nitrate fertilizer (a.n.f.o.), 10 cars cotton wool, 3 left at station not involved, 8 miscellaneous loads 228.1 (P)EXACTLY. 1 POUND OF T.N.T. AT A DISTANCE OF 1 FOOT -REF.4. 229 (N) SEAFLOOR VOLCANIC ERUPTION, REFERENCE 2 EXP-5 NEWTONS PER SQUARE METER 230.59 (NP) EARTHQUAKE RIECHTER 4.0 230.59 (NP) 1000 TONS OF T.N.T. 232 (N)LARGE NON-NUCLEAR EXPLOSION, 500 TONS, 1917 DESTRUCTION OF GERMAN WWI TUNNELS IN MESSINES RIDGE BELGIUM, HEARD OR FELT IN LONDON (N) -REF.1.,-REF.3. 234.09(P) = 100 ATMOSPHERES, BLAST WIND = 241.46 DB(Q) 235 (P) 1 TON T.N.T. AT 10 FEET, EXACTLY 235.3 DB -REF.4. ? (N)TORNADO AVERAGE, 5100 TONS OF T.N.T. -REF.1. 2004 235.19 (NP) EARTHQUAKE RIECHTER 5.0 235.19 (NP) 31624 TONS OF T.N.T. 240 (N)ONE KILOTON OF T.N.T EXPLOSIVE, 233 FOOT WIDE CRATER 29 FEET DEEP,10 P.S.I. AT 1000 FEET (P), 230 DB AT 10000 FT(N) -REF.2. 240?(N)TORNADO, FUJITSU 5, ENERGY GUESS BASED ON 300 MILE PER HOUR WIND, 1 MILE WIDE -REF.1.1997 241.46 (Q) = blast wind pressure from a 100 atm overpressure 243 (N)LARGEST NON-NUCLEAR EXPLOSION EVER, 1947 DESTRUCTION OF NAZ1 U-BOAT PENS USED 7100 TONS OF EXPLOSIVE -REF.1. -REF.3. 247 (P) BOMB INSIDE SHOCK WAVE MAXIMUM LIMIT PRESSURE OF T.N.T. EXPLOSIVE -REF.2.4 248 (N)ATOMIC BOMB-HIROSHIMA AND NAGASAKI JAPAN AUG. 6, 9, 1945.TRAGICALLY KILLED 300,000 PEAPLE. TOTALLY DISINTEGRATED 16 SQUARE MILES, CRACKED DISTANT CONCRETE WALLS 12" THICK, EQUAL TO 20,000 TONS OF T.N.T., WIND WAS AROUND 300 MILES PER HOUR, DESTROYED WALLS 28" THICK AT 1 MILE.POWER TO MAKE A CRATER 633 FEET WIDE AND 80 FEET DEEP -REF.1.2. 254.09 (P) = 1000 atmospheres overpressure, dynamic pressure = 261.721 db(Q) 255 (N) 600 KILOTONS GROUND BURST CRATER IS 2112 FEET WIDE AND 211 FEET DEEP -REF.2. 257 (N)NUCLEAR BOMB, 1 MEGATON (1 MILLION TONS OF T.N.T.) -REF.2. ? (N)NUCLEAR BOMB "OAK" 8.9 MEGATON, ENEWETAK,JUNE 29 1958,5740 FEET WIDE 204 DEEP CRATER 261.721 (Q) = dynamic blast wind pressure generated from a 1000 atmosphere overpressure 274.09 (P) = 10000 atmospheres overpressure, dynamic pressure = 282.042 db(Q) 278 (N)NUCLEAR BOMB, "BRAVO" TEST 15 MEGATONS, 1954, BIKINI ATOLL, MARSHALL ISLANDS -REF.2. ? (N)METEOR HITTING EARTH, "ARIZONA CRATER" SPEED WAS 44 MILES PER SECOND AND ABOUT THE SIZE OF A HOUSE AND MADE A CRATER ONE MILE IN DIAMETER 20 MT T.N.T. ? (N)NUCLEAR BOMB, 20 MEGATONS, SURFACE BURST CRATER IS 7392 FEET WIDE AND 792 FEET DEEP 282 (N)NUCLEAR BOMB, 57 MEGATONS HYDROGEN LARGEST EVER DETONATED, 1961 SHOCK WAVES CIRCLED THE EARTH 3 TIMES, FIRST ORBIT TOOK 36 HR 27 MIN. -REF.2. 282.042 db(Q) = dynamic wind pressure from a 10000 atm overpressure source 286 (N)MT. SAINT HELENS VOLCANO ERUPTION-BABY VOLCANO, BLEW DOWN TREES 16 MILES AWAY. COULD BE SEEN FROM OUTER SPACE ON THE SPACE SHUTTLE BLEW OUT SOME WINDOWS IN SEATTLE-TACOMA 200 MILES AWAY, 163 db (P) -REF.20. 294.09 (P) = 100000 atmosphere overpressure, dynamic pressure = 302.0488 db(Q) 296 (N)EARTHQUAKE 8.6 RIECHTER SCALE- GROUND MOVED UP AND DOWN 13 FEET. -REF.1.3. 1988 300 (N)HURRICANE -- AVERAGE, EXTREME ENERGY IS "DILUTED" BY COVERING 500,000 SQUARE MILES. ENERGY = APPROX. 1000 NUCLEAR BOMBS A SECOND. 302?(N) TUNGUSTA SIBERIA METEOR, BLEW DOWN HOUSES 600 MILES AWAY -REF.1.3. 1989 302.0488 db(Q) = dynamic pressure from a 100000 atmospheres overpressure 310 (N)KRAKATOA VOLCANO ERUPTION-1883 A.D., CRACKED ONE FOOT THICK CONCRETE AT 300 MILES, CREATED A 3000 FOOT TIDAL WAVE, HEARD 3100 MILES AWAY, SOUND PRESSURE CAUSED BAROMETERS TO FLUCTUATE WILDLY AT 100 MILES INDICATING LEVELS OF AT LEAST 170-190 DB (P) AT THIS DISTANCE OF 100 MILES EVEN WHEN SHOUTING IN SOMEONES EAR, COULD NOT BE HEARD AT 100 MILES CAUSED FOG TO APPEAR AND DISAPPEAR INSTANTLY AT HUNDREDS OF MILES ROCKS WERE THROWN TO A HIEGHT OF 34 MILES. DUST AND DEBRIS FELL CONTINOUSLY FOR 10 DAYS AFTER BLAST. PRODUCED VERY COLORFUL SUNSETS FOR ONE YEAR, EJECTED 4 CUBIC MILES OF THE EARTH. CREATED ANTI-NODE OF NEGATIVE PRESSURE AT THE EXACT OPPOSITE SIDE OF THE EARTH.SOUND COVERED 1 / 10 OF THE WORLDS SURFACE, SHOCK (SOUND) WAVES "ECHOED" AROUND THE EARTH 36 TIMES AND LASTED FOR ABOUT A MONTH! -REF.19. 316 (N)VOLCANO ERUPTION SORANTINI, ITALY,1470 B.C. ALTHOUGH MORE ENERGY THAN KRAKATOA, IT BLEW UP OVER A LONGER PERIOD OF DAYS AND NOT AS VIOLENTLY, HENCE THE INSTANT PEAK PRESSURE IS BELIEVED TO BE LOWER -REF.1.3. THAN KRAKATOA. 15 CUBIC MILES EJECTED, CREATED TIDAL WAVE 165 FEET HIGH AT A DISTANCE OF 80 MILES -REF.3. 320 (N)VOLCANO ERUPTION, TAMBORA INDONESIA,1815, EJECTED 36 CUBIC MILES.APPROXIMATELY EQUAL TO 14,000 MEGATON NUCLEAR BOMBS OR A 14 GIGATON BOMB BASED ON EJECTED VOLUME,CHANGE IN MEGATONS TIMES 1.345 EQUALS VOLUME EJECTED CHANGE.IF WAS A NUCLEAR BOMB IT WOULD CREATE A CRATER ABOUT 12.4 MILES WIDE AND 1.33 MILES DEEP.INTERNAL PRESSURE IS BELIEVED TO BE ABOUT 47 MILLION P.S.I. = 347 DB (P) -REF.1.3.
A lot of people don't realize how loud some car stereos are or realize how much it takes to get to that level. Not to mention it is pretty cool just to check out how loud some things actually are so here is a list I found on the net. Hope you guys enjoy. Btw, the few that talk about car audio are very inacurrate because you don't need that many woofers to get that loud.. but still interesting
That reminds me of the Mythbusters episode I watched tonight. They had a six pound hammer banging on a bridge pillar at 25 hits per second and it made the whole bridge shake. It was the earthquake test one where they where trying to find the resonant frequency of things.
