Intended Use
Hearing protectors should be worn at all times in noisy environments to assist with noise
reduction. When worn properly, Tough Sounds helps to reduce exposure to loud sounds
produced during activities such as sporting events, concerts, and hobbies such as
woodworking and carpentry. Tough Sounds also helps to reduce noise from power tools and
other loud equipment such as lawn mowers, tractors, drills, leaf blowers, and weed trimmers.
For very loud sounds, such as chain saws, circular saws, hammer drills, jack hammers,
fireworks, and gunfire, ION Audio recommends wearing earmuffs and earplugs at the same
time for additional noise reduction. If you are using noise reduction hearing protection, have
your hearing tested on a regular basis by a qualified professional, such as an audiologist or
medical physician.
Fitting Instructions
It is very important to have a proper fit when wearing Tough Sounds in order for its noise
reduction to be effective and offer hearing protection. Test the fit before entering an area where
there is loud noise.
1.
Place Tough Sounds on your head with the headband facing the top of your head.
2.
Adjust the cup fit by holding the headband in place and by sliding the cups up or down to
achieve an equally tight seal around both your ears and comfortable fit.
Important: If anything is interfering with a tight seal from the headphones, such as long hair,
thick eyeglass temples, pencils, hats, or earrings, adjust or remove these in order to have a
proper fit of Tough Sounds.
Do not curve or modify the shape of the headband as this will cause a loose fit and allow sound
to leak in to the headphone cups.
Noise Reduction Rating
Attenuation (ANSI S3.19-1974)
The level of noise entering a person's ear, when hearing protector is worn as directed, is
closely approximated by the difference between the A-weighted environmental noise level and
the NRR. Improper fit of this device will reduce its effectiveness in attenuating noise. Consult
the enclosed instructions for proper fit.
Test
125
Frequencies
(Hz)
Mean
Attenuation
18.1
(dB)
Standard
3.6
Deviation
(dB)
Example:
1.
The surrounding noise level measured at the ear is 85 dB.
2.
The NRR rating is 25 dB.
3.
The noise level entering the ear is approximately equal to 60 dB.
Although hearing protectors can be recommended for protection against the harmful effects of
impulsive noise, the Noise Reduction Rating (NRR) is based on the attenuation of continuous
noise and may not be an accurate indicator of the protection attainable against impulsive noise
such as gunfire.
Tough Sounds
Hearing Protection Instructions
Audición Instrucciones de Protección
For technical support: ionaudio.com/support
Para soporte técnico: ionaudio.com/support
Manual Version 1.0
250
500
1000
21.6
28.5
34.6
1.8
2.5
2.8
2000
3150
4000
36.0
38.8
36.2
2.4
2.7
2.7
6300
8000
NRR
39.0
38.8
25 dB
4.4
4.8