Web80. 2 times as loud as 70 dB. Possible damage in 8 h exposure. Passenger car at 65 mph at 25 ft (77 dB); freeway at 50 ft from pavement edge 10 a.m. (76 dB). Living room music (76 dB); radio or TV-audio, vacuum cleaner (70 dB). 70. Arbitrary base of comparison. Upper 70s are annoyingly loud to some people. Web7 jul. 2016 · If the motion is going through the crowd of molecules too slowly or too quickly, our body can’t transfer that motion into signals our brains understand. This is called frequency, and it’s...
How Far Away Can A Cat Hear?[Updated: April 2024]
Web23 mei 2011 · It's been suggested that the human voice travels only as far as the listener's ear. But of this were true, then when one person heard a voice, nobody who was farther … Web17 aug. 2016 · To answer your question, since it's now open, a normal human can hear Silbo (a whistled language) from up to 5 miles away. Sound really can travel that far. However, lower frequency sounds take less energy to travel longer distances: an alligator mating call, for example, can be heard for miles -- and that's at frequencies humans … how many kids die everyday
How loud is too loud? How many decibels is too loud? - Healthy …
In humans, sound waves funnel into the ear via the external ear canal and reach the eardrum (tympanic membrane). The compression and rarefaction of these waves set this thin membrane in motion, causing sympathetic vibration through the middle ear bones (the ossicles: malleus, incus, and stapes), the basilar fluid in the cochlea, and the hairs within it, called stereocilia. These hairs line the cochlea from base to apex, and the part stimulated and the intensity of stimulation give… Web6 jul. 2024 · There is a recorded case, under optimal acoustic conditions, of the human voice being detectable at a distance of 17 km (10.5 miles) across still water at night. … WebProduction of sound. Humans produce voiced sounds by passing air through the larynx.Within the larynx, when the vocal cords are brought close together, the passing … how many kids died in waco