The sperm whale is technically the loudest animal in the world, but the answer is up for debate because how we perceive loudness is subjective. Do you measure the loudest animal by the decibels they register or by the impact of the sound itself? The dispute comes down to two animals: the blue whale and the sperm whale.
Blue whale
Blue whales can make extremely loud whistling calls each other. Their sirens can reach 188 dB, louder than jet engine or grenade explosion. Sound carries further underwater, so the whales can be heard over 800km away.
It might look demure, but the bush stone-curlew has a call that would make just about anyone's blood run cold. Nicknamed the 'screaming woman bird', their high-pitched, drawn-out shrieks can be heard across the night as they try to contact each other.
The lion intimidates other competitors because scouting reports (my experience) say it's very loud. It has a reputation in Africa as the loudest roar.
Loud appliances such as a vacuum cleaner or power tools could exceed 80 dB. Human screams can be quite loud, possibly exceeding 100 dB (as of March 2019, the world record is 129 dB!) —but you probably want to avoid that because screams that loud can hurt your ears!
While blue whales are both the loudest and the largest animals, the sperm whale is louder in terms of pure decibels. Its clicks are measured at an incredible 230 decibels. These clicks, however, last for very short bursts and are often out of the range of human ears.
On the morning of 27 August 1883, on the Indonesian island of Krakatoa, a volcanic eruption produced what scientists believe to be the loudest sound produced on the surface of the planet, estimated at 310 decibels (dB).
The best thing in the world is truth - as long as it is not cruel to a friend. Or it's pleasure, as long as it is not in haste to end.
A fish is the quietest animal in the world. Other quiet animals are: owls, sloths, octopuses, beavers or house cats.
At 114 decibels, the roar of a lion is loudest of all wild cats in the world. Lions have the loudest roar of any big cat. A lion's roar can reach 114 decibels at a distance of about 1 meter.
Researchers have discovered that the greater wax moth is capable of sensing sound frequencies of up to 300 kHz -- the highest recorded frequency sensitivity of any animal in the natural world.
Common Sources of Noise and Decibel Levels
Loud noise above 120 dB can cause immediate harm to your ears.
Amusingly, the loudest word ever shouted is, quiet. The current Guiness World Record in shouting has been held by Annalisa Wray since 1994. At the Citybus Challenge in Belfast Northern Ireland, she ironically yelled the word quiet to a level of 121.7 decibels, almost as loud as a jet engine!
How loud is a gunshot? Decibel levels for firearms average between 140 and 165 dB.
"You're not hearing things, our resident lyrebird Echo has the AMAZING ability to replicate a variety of calls - including a baby's cry." Echo is a superb lyrebird (Menura novaehollandiae), an Australian bird named for the shape of its tail during courting, according to Britannica.
Porcupines can sound like babies in the dark, video shows | Centre Daily Times.
Mosquitos are by far the deadliest creature in the world when it comes to annual human deaths, causing around one million deaths per year, compared to 100,000 deaths from snakes and 250 from lions. Perhaps surpringly, dogs are the third deadliest animal to humans.
Australian Box Jellyfish
The box jellyfish is the world's most venomous animal with four species — Chironex fleckeri, Carukia barnesi, Malo kingi, and Chironex yamaguchii — considered highly venomous. The Chironex fleckeri, also known as the Australian box jellyfish is considered the most venomous animal in the world.
As a nation we abhor cruelty to animals, but few of us realise that legally sanctioned acts of cruelty to animals happen every day in Australia.