Crescendo

Exposure to very loud sound for long period of time will damage hair cells in the ear and leads to noise-induced hearing loss.

• True

• False

People who works in setting where noise level is very high should have hearing check annually.

• True

• False

Earmuff is the only hearing protection device that can help to reduce noise.

• True

• False

Which of the following is/are components of Crescendo hearing protection?

• Acoustic chamber

• Tuned membrane

• Sound damping mesh

• TPE earpiece

Different filter is used in each type of Crescendo hearing protection depending on the use cases.

• True

• False

What are the benefits of Crescendo?

• Blocks all sounds to avoid conversation

• Allows air ventilation of the ear

• Reduces noise and loud sound to safe level

• Filters and ear tips are washable and reusable

How is the amount of attenuation expressed?

• Signal to Noise Ratio

• Single Number Rating

• Noise Reduction Ratio

• Noise Reduction Rating

Choose the true statements :

• All products use the same filter

• The shape of the frequency curve can be affected by the filter

• Different filters will have different number of NRR

• One can use sound level meter to measure the environmental sound level at the workplace

Choose the true statement :

• Crescendo product cannot be used in conjunction with earmuff

• Crescendo Music 20 is suitable to used by violinist who often perform in orchestra

• Crescendo FLY cannot be used throughout the flight, it should only be used during take-off and landing

• Crescendo Office 15 helps reduce office sound and noise so that you do not need to response to your boss

Choose the true statements :

• Crescendo Sleep 25 is suitable to wear to sleep for whole night

• One has to be careful while using Swim & Surf as it will sink deep in the pool

• Swim & Surf prevents water from going into the ear while not blocking the sound from going in

• Signal to Noise Ratio is used to express the number of attenuation of a hearing protection device