What SensGard does

SensGard LLC is a privately held manufacturer of passive acoustic hearing protection devices, operating from East Rochester, New York, with reported headcount between 1 and 10 employees. The company commercializes the patented Zwislocki Ear Muffler (ZEM) technology developed by auditory scientist Dr. Jozef Zwislocki, whose research began in the 1960s through joint projects between Harvard University and the U.S. Navy and continued at Syracuse University's Institute for Sensory Research, which he founded. SensGard positions its products as a "third category" of hearing protection, distinct from foam earplugs and over-ear muffs, using acoustic chambers that redirect and dissipate sound energy rather than blocking it entirely.

The product line consists of two core devices — the SG-31 (NRR 31, $34.99) for extreme noise environments such as firearms and industrial equipment, and the SG-26 (NRR 26, $24.99) for everyday high-noise applications including power tools and concerts — along with accessory items including a $9.99 storage case and a $2.99 four-pack of replacement cuffs. All SensGard devices are passive (no batteries or electronics), lightweight, foldable, and manufactured in the United States. The underlying intellectual property rests on a single registered patent for the ZEM acoustic chamber, with no iterative platform evolution visible in the source data.

SensGard operates exclusively through direct-to-consumer e-commerce via its own website (sensgard.com), with no retail distribution, marketplace listings, or channel partnerships evident. The company addresses use cases spanning shooting sports, woodworking and DIY, industrial work, travel, music performance, and sensory-sensitive applications, with primary emphasis on shooting sports and professional/work environments. SensGard has raised approximately $275,000 across three disclosed funding events since 2004 and operates with a small, bootstrap-style capital base consistent with a micro-cap consumer hardware company.

Name

SensGard

Legal name

SensGard LLC

Website

https://sensgard.com

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

1–10 employees

Short description

SensGard LLC manufactures passive acoustic hearing protection devices based on patented ZEM chamber technology, selling direct-to-consumer via sensgard.com to individuals in shooting sports, woodworking, DIY, industrial, and music applications across North America.

Ownership category

akta.pro rank

Headquarters

HQ city

East Rochester

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D, Others

Revenue model

1. Direct Hardware Sales: One-time purchase model for hearing protection devices. Customers buy the SG-26 (NRR 26) or SG-31 (NRR 31) products directly through the e-commerce website. Accessory items like storage cases and replacement cuffs sold separately.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

SensGard designs, manufactures, and sells passive, non-electronic over-ear hearing protection devices built around its patented ZEM (Zwislocki Ear Muffler) acoustic chamber technology. The flagship SKUs are the SG-26 (NRR 26) and SG-31 (NRR 31) ear muffs, sold alongside replacement cuffs and a branded storage case directly to consumers for use in shooting sports, industrial noise, travel/sensory needs, DIY/home tasks, and music/performance environments.

Product overview

SensGard offers a focused product line of passive acoustic hearing protection devices based on patented ZEM (Zwislocki Ear Muffler) technology developed from research at Syracuse University. The portfolio consists of two core hearing protection models—the SG-31 (NRR 31 for extreme noise) and SG-26 (NRR 26 for everyday high-noise environments)—available in multiple color variants including black, lime green, red, and orange. Supporting the core products are accessories including a storage case and replacement cuff 4-pack. All SensGard devices are battery-free, lightweight, and foldable acoustic chamber systems that redirect and dissipate harmful sound energy while maintaining situational awareness and speech clarity.

Differentiator

Problem solved

Functional benefit

Products and services

• SensGard SG-31 Hearing Protector

Quantifiable outcome

• NRR 31 provides maximum protection for extreme noise (firearms, chainsaws, industrial equipment)
• +2 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators4 records

Recent moves5 records

Expansion highlights3 records

Direct peers

• Elvex Corporation: Elvex manufactures specialty hearing protection earmuffs and banded devices for industrial and shooting applications, competing most directly with SensGard's passive acoustic protection positioning in the work/industry segment.
• Etymotic Research: Etymotic designs high-fidelity hearing protection and earphones with strong audiologist and musician positioning, overlapping with SensGard's music/performance and specialty hearing-protection segments.
• Walker's Game Ear: Walker's specializes in hearing protection and enhancement for shooting sports and hunting, directly overlapping with SensGard's primary shooting-sports and outdoor use-case segment with both passive and electronic offerings.

Emerging players

• Decibullz: Decibullz makes custom-molded and passive hearing protection products sold DTC, competing in overlapping use cases (shooting, industrial, music) with a comparable small-team, niche-brand posture.
• ISOtunes: ISOtunes is a fast-growing DTC-focused brand offering Bluetooth-enabled and passive hearing protection for work, DIY, and shooting — sharing SensGard's e-commerce-led, niche-differentiation go-to-market approach but with an electronics-forward product angle.

Broad incumbents

• Howard Leight by Honeywell: Honeywell's Howard Leight is a leading hearing-protection brand offering earmuffs, plugs, and banded devices across industrial and consumer retail channels, competing head-to-head with SensGard across many of the same use cases (shooting, industrial, DIY).
• 3M PELTOR: 3M's PELTOR brand is the dominant incumbent in passive and electronic hearing protection, serving industrial, military, and shooting-sports markets globally with extensive retail and B2B distribution — directly comparable to SensGard's product category but at vastly greater scale and SKU breadth.
• MSA Safety: MSA Safety supplies a broad portfolio of industrial safety products including passive and electronic hearing protection for occupational and military markets, comparable to SensGard's industrial/work segment but with much broader product breadth and global B2B distribution.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat2 records

Key risks5 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/sensgard

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds3 records

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SensGard