How to read your own audiogram, line by line

Your kid asks you something from the back seat three times and you still guess wrong. Your wife has started saying "never mind." You've cranked the TV to a number you'd have made fun of at 25. So you finally sit in the padded booth, press the button when you hear the beep, and walk out with a sheet of paper covered in red circles and blue X's that nobody spent more than ninety seconds explaining.

That sheet is an audiogram, and you can read it yourself in about five minutes. It's a graph. Pitch runs left to right, from around 250 Hz (low, like a truck idling) to 8,000 Hz (high, like a smoke alarm chirp or the "s" in your daughter's name). Loudness runs top to bottom, in decibels hearing level. Quiet is at the top. The louder a sound has to be before you can just barely hear it, the lower your mark sits on the page.

That's the part that trips people up. Down is bad. A line drooping toward the bottom right corner isn't a strong result. It's the shape of hearing loss.

Red is right, blue is left

Circles in red are your right ear. X's in blue are your left. Old habit, universal convention, and it works because you can see asymmetry from across the room.

Draw an imaginary horizontal line at 25 dB. For adults, thresholds from 0 to about 25 dB get called normal. Then the usual buckets:

• 26 to 40 dB is mild
• 41 to 55 dB is moderate
• 56 to 70 dB is moderately severe
• 71 to 90 dB is severe
• 91 dB and below is profound

"Mild" is a lousy word for what mild loss does to a dinner table. At 35 dB in the high frequencies, you don't lose volume so much as consonants. F, s, th, sh, t and k all live up high and they carry most of the meaning in English. Vowels are loud and low and they come through fine. So speech doesn't go quiet. It goes mushy. You hear that somebody said something and you can't tell what.

The dip at 4,000 Hz

Now look at the shape. Noise damage has a signature and it's almost embarrassing how consistent it is: a notch centered somewhere between 3,000 and 6,000 Hz, with hearing coming back up a little at 8,000 Hz. Both ears usually, though the ear that faced the saw or the driver's window often looks worse.

If your line is flat and comfortable across the low and mid frequencies and then dives at 4,000 and partly recovers, you're looking at a receipt. Deer rifle without plugs. Two summers on a framing crew. A band in your twenties. Leaf blower, every Saturday, for a decade.

Age-related loss looks different. It slopes gently down from the mid frequencies and keeps going, no recovery at 8,000. Most men over 45 who've worked with their hands have some of both, which is why the line often looks like a ski slope with a pothole in it.

The extra brackets, and why they matter

Some audiograms carry a second set of marks: angle brackets or square brackets, sitting apart from the circles and X's. Those are bone conduction. The tester puts a small vibrator on the bone behind your ear and bypasses your eardrum and middle ear entirely, testing the nerve directly.

Compare the two. If the brackets sit right on top of the circles, the machinery in your middle ear is passing sound along fine and the loss is in the inner ear or the nerve. That's sensorineural, and it's the permanent kind.

If the brackets sit noticeably higher than the circles, say 20 dB better, something is blocking sound on the way in. Wax, fluid, a stiff or perforated eardrum, a middle ear bone that isn't moving. That gap has a name (air-bone gap) and the reason you care is simple: conductive loss is often fixable. Wax takes ten minutes. Fluid may clear. Some middle ear problems are surgical.

A mixed picture, gap plus a droop, means you've got both. Also fixable in part, which is better than not at all.

The number that isn't on the graph

Look for a separate box with percentages. Word recognition, sometimes written as a score like 92 percent at a set loudness. That's how well you repeat back single words when they're played loud enough for you to hear them comfortably. It tells you whether your ear can still make sense of clear speech once volume isn't the problem.

Here's the gap in the whole process, and you should say it out loud to whoever tested you: a quiet sound booth with one voice is nothing like a Mexican restaurant on a Friday. Plenty of men test "normal" and still can't follow a conversation at a birthday party. If that's you, ask specifically for a speech-in-noise test. It's a different measurement and it catches what the beeps miss.

When it's not a "schedule it sometime" problem

Three findings on that page mean you pick up the phone instead of filing the paper.

One ear clearly worse than the other, with no obvious reason like a single blast or a bad ear infection on that side. Noise and age hit both ears roughly together. A one-sided sensorineural loss is a finding that deserves an ENT's opinion, not a shrug.

Sudden loss. If your hearing drops in one ear over hours or a couple of days, sometimes with a plugged feeling or ringing, that's treated as urgent. Treatment works best when it starts within the first days, not after you've waited out a week to see if it clears. Same week, not same month.

Ringing in one ear only, or ringing paired with dizziness, gets checked.

None of this is medical advice and I can't read your chart. An audiologist and an ENT can, and they'll do it faster than you'd expect.

What you do Monday

Get a baseline and keep the paper. A photo of the audiogram in your phone is enough. Ten years from now, the comparison is worth more than any single test, because a 10 dB slide across the high frequencies is invisible day to day and obvious side by side.

Then protect what's left, at the level you'll actually sustain. Perfect protection you skip beats nothing, but only on paper. Foam plugs cost pennies a pair and cut real noise when they're rolled thin and seated deep enough that your own voice sounds hollow. If they're sticking out like a cork, they're decoration. Keep a bag in the truck console, one in the mower bag, one in the range bag.

Muffs are easier to get right and easier to put on for a two-minute cut. Electronic muffs run more but they let you hear a range officer and a kid and still clamp down on the shot, which is the difference between wearing them and taking them off to talk. Doubling up plugs under muffs adds around 5 dB, not the sum of both numbers. Still worth it next to a muzzle brake.

And the honest trade-off: a year of religious hearing protection won't lift that notch off the page. What's gone is gone. What you're buying is the next 4,000 Hz, and the one after that, and the chance that at 70 you're the guy still following the conversation instead of nodding along at the end of the table.

Your grandkid is going to mumble. Everyone's grandkid mumbles. Put the plugs in the console so you've got a shot at hearing it anyway.