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Etymotic Research ER135 QSA-BZ Personal Sound Amplifier (Bronze, Single)
Etymotic Research ER135 QSA-BZ Personal Sound Amplifier (Bronze, Single)

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The BEAN® can provide that one click of clarity. As a personal amplification device–also known as a Quiet Sound Amplifier–The BEAN features a built-in sensor that automatically adjusts to the surrounding noise level. It amplifies soft sounds, while keeping the volume steady on louder noises or even reducing it for extremely loud sounds such as fireworks or the strike of a drum. Moreover, it boosts soft high-pitched sounds heard in speech, which helps provide clarity for conversations, particularly in less-than-ideal listening environments.

The BEAN amplifies sounds and enhances your hearing experience so your conversations become more effective in the car, in social situations, and at a distance. It comes in two models–The BEAN and the T-coil BEAN.

The T-coil BEAN can be used with hearing-aid compatible telephones and loop systems. Loop systems take their name from a loop of wire that is placed around a room or large area. The loop sends an electromagnetic signal to the BEAN, which then changes that signal to sound. The benefits are improved hearing in reverberant conditions or when a talker is too far away to be heard clearly with amplification.


  • Operates so smoothly it is almost undetectable
  • Provides high-frequency amplified hearing for the soft sounds of speech
  • Excellent speech intelligibility in both quiet and noisy conditions
  • 2-position switch offers two levels of enhancement
  • Loud sounds are heard naturally with no additional boost.
  • Subtle, low-battery signal alerts user before the battery dies
  • Long battery life (10-12 days) on a tiny cell


  • Can be purchased from any source without referral
  • Designed to fit comfortably and look good in either ear
  • Ready-to-use right out of the box
  • No adjustments needed; no controls to adjust
  • Delivers high-fidelity sound quality and amplified hearing
  • Handles high inputs of music without distortion
  • Does not require custom molds
Price: $214.00
UPC: 898234000947
Part Number: ER135-QSA-BZ

Availability: In Stock

Product Code: ETY-ER135-QSA-BZ

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The impetus for developing a personal sound amplifier comes from decades of interacting with consumers who need a boost in sound for church, television and other communication situations that are not always clear, depending on background noise and proximity to the speaker. Accessibility and affordability are real concerns for millions of Americans.

Given Etymotic Research's 30+ year history in auditory research, hearing loss prevention, high-fidelity hearing aid circuitry and consumer electronics, it is natural for Etymotic to create a highly-sophisticated personal sound amplifier.

Consumers of all ages want the ability to communicate easily and effectively with family, colleagues and acquaintances in business and social situations. They want easy access to affordable technologies for their daily routines and recreational activities, and they want products that help them interact and compete in a complex world.

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