Any repeated high-volume experiences or 1-shot booms could damage the delicate nerve cells of your inner ear. And once damaged, these cells don't grow back. A good rule of thumb is that damage is happening if you have to shout to be heard over the racket.
Here are some everyday activities that are possible hearing hazards.
The Occupational Safety and Health Administration has done a good job of setting safe noise levels in industry. Many people use ear protection at work. But they often aren’t as careful at home, experts say. A motorcycle, firecrackers, and small guns all produce sound between 120 and 150 decibels (dB). That is enough to damage hearing.
Shooters are exposed to very loud but short-term sound when a weapon is fired. All shooters should wear hearing protectors even when shooting small-caliber weapons such as a 22 rifle. Long and repeated exposure to noise levels at 85 dB or higher can result in hearing loss. Gun sound levels may reach 120 or greater decibels during firing. Here are some examples reported by the CDC:
12-gauge shotgun. 154.6 to 162.7 dB
0.45-70 rifle. 155.2 to 159.9 dB
0.30-06 rifle. 158.7 to 163.1 dB
Baby toys and bike horns that are high-pitched can give off quick bursts of damaging noise when pressed or squeezed over and over again. The American Academy of Pediatricians warns parents that media players such as iPods or MP3 players can cause hearing loss. Earphones or ear buds for these items can reach a damaging noise level up to 130 dB.
Busy traffic and highway construction can cause ringing or a sense of fullness in the ears. These are key signs that hearing damage has happened. When highway noise gets very loud, drive with the windows up. According to the CDC, traffic sounds of 85 dB or greater for long periods of time can create lasting hearing loss.
Compare some of these common sounds and their rank of possible harm with what your ears are open to every day:
20 dB - rustling leaves
38 dB - whisper
40 dB - refrigerator humming
40 dB - quiet room
50 dB - average rainfall
60 dB - dishwasher, people talking
70 dB - vacuum cleaner
80 dB - busy street, alarm clock
88 dB - motorcycle (25 feet)
90 dB - lawnmower, food blender
100 dB - chainsaw, snowmobile
110 dB - symphony orchestra
120 dB - oxygen torch
130 dB - shotgun
140 dB - jet plane take-off (near)
150 dB - rock concert (peak)