5 ways to listen better - Julian Treasure

In our louder and louder world, says sound expert Julian Treasure, “We are losing our listening.” In this short, fascinating talk, Treasure shares five ways to re-tune your ears for conscious listening — to other people and the world around you.

(Recorded at TEDGlobal 2011, July 2011, in Edinburgh, Scotland. Duration: 7:50.)

From TED

Growth Hormone May One Day Repair Cochlea Hair Cell Damage

Researchers from Western Kentucky University and the University of Louisville have identified a growth hormone that repairs hair cell damage in the ear of a zebrafish. The findings may one day lead to a therapy for repairing cochlea hair cells in humans.

As hearing professionals are well aware, loud noise, especially repeated loud noise, can cause irreversible damage to the hair cells inside the cochlea and eventually lead to deafness. In mammals, this is irreversible; however both birds and fish are able to regrow the damaged hair cells and restore hearing.

But how?

Researchers from Western Kentucky University and the University of Louisville experimented with zebrafish and examined their internal repair process.

They first looked for the zebrafish genes that were switched on or off after acoustic trauma and found distinct patterns of gene expression. Two days after noise injury in the zebrafish, inner ear cells were busy dividing to repair and replace the damaged hair cells.

The researchers traced the repair to an alteration in the regulation of 839 genes. Many of the cellular pathways involved were the same as those involved in cancer. This included a massive 64 fold increase in the transcription of growth hormone.

They then investigated the effect of injecting growth hormone (GH) on cell proliferation in control zebrafish utricles and saccules, since GH was significantly increased in the zebrafish following acoustic trauma.

The GH injection increased cell proliferation in the inner ear of non-sound-exposed zebrafish, suggesting that GH could play an important role in sensory hair cell regeneration in the teleost ear.

The research, published in BioMed Central's open access journal BMC Neuroscience, may one day lead to a growth hormone therapy for repairing damaged hair cells in humans.

SOURCE: Hearing Review

Evelyn Glennie shows how to listen

Evelyn Glennie is a scottish percussionist and composer. She lost nearly all of her hearing by age 12. Rather than isolating her, it has given her a unique connection to her music.

In this soaring demonstration, deaf percussionist Evelyn Glennie illustrates how listening to music involves much more than simply letting sound waves hit your eardrums. She leads the audience through an exploration of music not as notes on a page, but as an expression of the human experience. Playing with sensitivity and nuance informed by a soul-deep understanding of and connection to music, she talks about a music that is more than sound waves perceived by the human ear. She illustrates a richer picture that begins with listening to yourself, and includes emotion and intent as well as the complex role of physical spaces — instrument, concert hall and even the bones and body cavities of musician and listener alike.

Recorded February 2003 in Monterey, California. Duration: 32:20
From TED

Another great testimony illustrating that hearing loss doesn't imply the loss of musicality! :)