Forklifts are loud. The question is how loud, and whether that loudness is enough to damage an operator’s hearing over a career measured in years. The short answer is that it often is. Most internal combustion forklifts produce 85 to 95 dBA at the operator position during normal operation, and OSHA’s 8-hour permissible exposure limit is 90 dBA. An operator who runs an IC truck for a full shift with occasional peak loads may be at or above the 85 dBA action level that triggers a hearing conservation program. Even electric trucks, which are quieter in the powertrain, still carry backup alarms, horns, and impact noises that produce peak levels above 100 dBA. The CDC estimates that 22 million workers are exposed to hazardous noise each year, and material handling equipment operators are among the populations at risk (OSHA noise overview, snapshot 2026-09-20). This guide explains the noise levels a forklift produces, the OSHA and NIOSH standards that govern exposure, how to assess the risk at your facility, and what a hearing conservation program looks like in a forklift environment. The OSHA regulations guide covers the broader powered industrial truck standard; this guide covers the ears.
What noise levels do forklifts produce
The noise a forklift produces depends on its power type, the enclosure, and the operating condition. Internal combustion forklifts, powered by propane, gasoline, or diesel, are the loudest. Published measurements from equipment manufacturers and independent researchers place the operator ear-level reading for a typical 5,000 lb capacity IC truck at 85 to 92 dBA at idle, rising to 95 dBA or higher during hard acceleration, lifting, and maneuvering in enclosed spaces. Exhaust systems, cooling fans, and hydraulic pumps each contribute. A poorly maintained muffler or a loose engine mount can easily add 5 dBA. The forklift propane safety guide covers the gas handling side; the noise side is powered by the same engine.
Electric forklifts are quieter on the drivetrain side. Typical operator-ear readings range from 78 to 85 dBA at full throttle, well below the 85 dBA action level for the propulsion noise alone. However, electric trucks still carry backup alarms, which are required on many sites and typically rated at 87 to 112 dBA at 1 meter depending on type and manufacturer. A pneumatic or mechanical impact horn adds 100 to 115 dBA at close range, and it is the backup alarm and impact noise that push the total dose for an electric truck operator above the action level on many shifts. The forklift backup alarm guide and forklift horn safety guide cover the operational rules for these devices; this guide covers the cumulative noise exposure.
Pedestrians working near forklifts face a different exposure profile. A pedestrian on foot in a busy aisle who is passed by multiple IC trucks, each sounding its alarm, in the course of a shift can accumulate a noise dose that approaches the action level even though they are never on the truck itself. The warehouse pedestrian safety guide and the fall zone guide describe the physical separation rules; the noise burden is an additional and often overlooked hazard.
OSHA 1910.95 and what it requires
OSHA’s occupational noise exposure standard, 29 CFR 1910.95, sets the regulatory framework. The permissible exposure limit is 90 dBA as an 8-hour time-weighted average with a 5 dBA exchange rate, which means that every 5 dBA increase halves the allowable time. At 95 dBA the limit is 4 hours, at 100 dBA it is 2 hours, and at 110 dBA it is 30 minutes. The standard also defines an action level of 85 dBA TWA, above which the employer must implement a hearing conservation program that includes noise monitoring, audiometric testing, hearing protection, training, and recordkeeping (OSHA 1910.95(c)-(o), snapshot 2026-09-20).
For a forklift operator in a typical IC truck running 8 hours, a sustained 88 dBA reading at the operator’s ear means the exposure exceeds the action level and requires a full hearing conservation program. If the same operator spends part of the shift with the truck idling at the dock and part in hard maneuvering where levels reach 95 dBA, the cumulative dose likely exceeds the PEL and makes hearing protection mandatory. OSHA also requires that hearing protectors reduce exposure to at least 90 dBA TWA, and to 85 dBA TWA for any employee who has experienced a standard threshold shift as measured by audiometric testing (OSHA 1910.95(j), snapshot 2026-09-20). The forklift PPE guide covers the broader personal protective equipment picture.
NIOSH, the research arm of CDC, recommends a more protective exposure limit of 85 dBA TWA with a 3 dBA exchange rate, which is stricter than OSHA’s PEL. The NIOSH recommended exposure limit, while not enforceable as a standard, is widely used by industrial hygienists as the benchmark for a truly protective program (NIOSH noise topic page, snapshot 2026-09-20). The difference matters: at a 3 dBA exchange rate, a 95 dBA exposure allows only about 2.5 hours before the recommended limit is reached, versus 4 hours under OSHA’s OSHA PEL.
How to assess noise exposure in a forklift operation
Noise monitoring is the only reliable way to determine whether a site’s forklift fleet pushes operator or pedestrian exposures above the action level. A sound level meter can capture spot readings at the operator’s ear during a typical cycle, and a personal noise dosimeter worn by the operator for a full shift gives the time-weighted average that determines regulatory compliance. The NIOSH Sound Level Meter app, available for iOS, provides a screening tool for quick checks, though it does not substitute for calibrated dosimetry for compliance purposes (OSHA noise overview, snapshot 2026-09-20).
The key measurements to take are the operator’s full-shift TWA, the peak levels of the backup alarm and horn, and the ambient noise floor in the aisles and dock areas where pedestrians work. Multi-truck operations, where several forklifts operate in the same aisle, can produce background levels that exceed the action level for unprotected pedestrians even when no single truck is running at full load. The warehouse safety guide and the intersection safety guide describe the physical environment; the noise monitoring adds a data dimension.
Hearing conservation for forklift operators
A hearing conservation program for a forklift operation follows the same elements as any OSHA 1910.95 program: baseline and annual audiometric testing, hearing protection options, training, and recordkeeping. The specific considerations for materials handling include selecting protection that does not interfere with the operator’s ability to hear audible warnings. Overprotection, where an operator cannot hear a backup alarm or a shouted warning because the earmuffs block too much sound, is a real hazard in a forklift environment. The solution is to select hearing protection with a noise reduction rating that matches the measured exposure rather than the highest NRR available, and to use level-dependent or electronic earmuffs that amplify ambient sounds below a threshold while still protecting against peaks (OSHA noise exposure controls, snapshot 2026-09-20).
For pedestrians and dock workers who are not forklift operators but work in noise zones: the same threshold applies. Anyone whose 8-hour TWA reaches 85 dBA must be enrolled in the hearing conservation program, and exposures above 90 dBA require mandatory hearing protection. The forklift risk assessment guide and the forklift safety program guide explain how to fold noise hazard identification into the broader facility safety process.
Engineering controls to reduce forklift noise
The hierarchy of controls applies to noise as it does to any hazard: elimination and engineering controls come before PPE. Enclosing the operator cab with sound-dampening materials can reduce operator-ear levels by 5 to 10 dBA on IC trucks. Installing high-flow mufflers and maintaining the exhaust system prevent the additional noise that a worn muffler produces. On the pedestrian side, switching from older piezoelectric alarms to broadband or multi-tone alarms reduces the annoyance and peak level while maintaining the warning function. Some sites have adopted volume-adjustable alarms that automatically match the ambient noise floor, producing a quieter sound on a quiet dock and a louder sound on a noisy one. The hierarchy of controls guide explains the general framework; the choosing a safety system guide covers the trade-offs between audible and visual warnings for pedestrian detection.
The annual OSHA recordable hearing loss threshold is a 10 dB standard threshold shift in hearing relative to the baseline audiogram, averaged over 2000, 3000, and 4000 Hz. Approximately one in four workers who report hazardous noise exposure at work also report hearing difficulty, according to the Bureau of Labor Statistics and NIOSH surveillance data, and the prevalence is higher in industries where IC forklifts and other heavy equipment operate indoors. With about 90 monthly US searches for “industrial hearing protection” and material handling among the top employing industries for hearing conservation programs (DataForSEO snapshot, 2026-09-20), the risk is large enough that every multi-truck facility should verify its exposure levels rather than assume they are below the threshold.
Measure your facility’s broad risk profile with the Risk Scorer, explore the systems index for noise monitoring and alarm management solutions, review your state’s injury data for hearing loss trends in warehousing, see how statistics on this site are computed on the methodology page, and request comparable vendor specifications through the quote form.