Comes with 2 washable earplugs and a free case. They are designed to allow the wearer to hear all highs and lows for optimum performance. The cap and stem that extend out of the HiFi HEAROS form a folded horn and resonance structure that vibrates at the same 2.8kHz resonance as the human ear. When combined with the concha resonance of the ear canal at the end of the HiFi filter, the physics of the HiFi HEAROS result in an eardrum pressure frequency-balanced like that of a normal, open ear but with sound pressure reduced by 20 decibels.
From the Informa Healthcare website:
"Symphony orchestra musicians from The Royal Danish Theatre (15 females and 80 males) aged 22 to 64 years were audiologically examined to elucidate the presence and the frequency of noise-induced hearing loss among classical musicians. Compared to a reference material (ISO 7029) the median hearing thresholds of the musicians were increased for all age groups. When using hearing sensitivity in one or both ears <20 dB HL as a criterion for normality, it was found that 58% of the musicians had a hearing impairment. 50% of the males and 13% of the females showed a typical audiogram with a notched curve at higher frequencies normally attributed to occupational noise exposure. Furthermore, a significantly poorer hearing on the left ear was found at higher frequencies among the violinists. It is concluded that symphonic musicians suffer from hearing impairment and that the impairment might be ascribed to symphonic music."
"These ear plugs changed my life at work in my symphony job. I play trombone and am often placed very close to the timpani and bass drum on classical concerts (let alone the trumpets and trombones that are around me). The amplification for our pops concerts has become louder and louder as the years pass. I could tell after a only couple years in my post that my hearing was suffering, but I hated using the foam ear plugs the my employer provided because I found it hard to play and hear
I tried these ear plugs 3 years ago and ever since use them almost all the time, even at loud, non-amplified concerts. They do not create that "stuffy" sound that foam ear plugs create. These ear plugs work by filtering sound instead of blocking it. One of my colleagues had some of those custom built ear plugs that fit in your ear perfectly (at a cost of over $100) and he switched to these and hasn't gone back." Jason Stromquist, 2nd trombone, Omaha Symphony.
These ear plugs will save your hearing! Don't take chances with your most important asset as a musician.