Listening to Compressed Music Can Actually Harm You

arj

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Apparently
The real surprise came from the stapedius muscle reflex, A.K.A. your ear’s built-in volume guard. In the uncompressed group, reflex strength recovered fully by the next day. In the compressed group, it stayed stuck at about half strength for a full week.

Source : https://www.headphonesty.com/2025/05/listening-digital-compressed-music-harm/

Hearing safety rules have long leaned on something called the “energy in equals energy out” hypothesis, or the idea that total sound energy (volume × time) drives risk. Turn up the volume, and you simply have to listen for less time.

That works fine for most noise, like machinery hum or the roaring traffic, because their levels scatter naturally in a bell-curve pattern. Regulators have even made special allowances when sounds stray from that curve, like with impulsive noises such as gunfire.

But dynamic-range compression breaks that rule by filling in every tiny pause. Instead of highs and lows, the levels cluster tightly around the average. This makes it more like a garden-hose at full blast than a stream trickling over rocks.




Changes_in_track_volume_on_remastered_versions_of_Abba_s_Super_Trouper__From__Wikimedia_Common...jpg
 
The correct heading should be "Companded music" not "compressed music".
Some people may misunderstand the current topic as "coding compression" (in other words misunderstand the thread as "mp3 music is harmful to hearing!")
 
The correct heading should be "Companded music" not "compressed music".
Some people may misunderstand the current topic as "coding compression" (in other words misunderstand the thread as "mp3 music is harmful to hearing!")
What’s companded music?

@arj, this is an interesting bit of research even if it describes the effects on Guinea pigs to start with.

“…dynamic-range compression breaks that rule by filling in every tiny pause. Instead of highs and lows, the levels cluster tightly around the average. ” - not sure if the study isolated this as the cause or its just loudness that caused these changes in the stapedius.

The article describes transcient changes in the stapedius muscle reflex.

The next bit is puzzling. The author may be taking liberties and
He also goes on to say: “follow-up checks found no change in the tiny synapses of inner-hair cells, which rules out a hidden synaptopathy. That points squarely at a neural-pathway fatigue, so your ear’s reflex system simply can’t rest.——

Not sure again how he reached this conclusion ?
They looped Adele’s “I Miss You” for four hours straight at an average of 102 dB (just below the UK Health and Safety Executive’s live-music limit).
One group heard the original track, with its loud-and-soft contrasts intact. The other heard a heavily compressed version

Will look for the original paper to find out more
 
We needed exactly you to take a look at this and give a more realistic view :)

I wonder who was the guinea pig here..the guinea pig or Adele ?
Let’s not forget: a short loop repeated at 102 dbA for 4 hours!

The important finding is that after the 4 hours the group made to listen to the compressed version had some measurable changes in the short term in the Stapedius muscle reflex, and no difference between the two groups in the audiometric measurements.
It’s a good exploratory study with interesting findings. Needs to be independently replicated to see if others have the same findings.
 
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