What to keep
- Lower the level before starting a new waveform or combining several sounds.
- A percentage slider controls relative digital gain; it does not measure dB at the ear.
- Stop if listening becomes uncomfortable, painful or leaves ringing or muffled hearing.
Why duration matters
Sound exposure accumulates. WHO guidance illustrates the relationship with weekly examples: around 80 dB may correspond to roughly 40 hours per week, while 90 dB reduces the example allowance to about four hours. The safe duration falls rapidly as level rises.
Those figures are exposure guidance, not a promise that any listening session below a number is risk-free. Individual susceptibility and measurement uncertainty still matter.
Why the browser cannot show your dB
The same digital signal can produce very different acoustic levels through different headphones, speakers and amplifiers. Fit, equalisation and device gain also change the result.
Frequency Master therefore does not label its volume control in decibels. To estimate exposure, use equipment with a calibrated listening-level or dose feature, or measure the actual setup correctly.
Layering needs extra headroom
Combining noise, rain, drums and a generated tone adds energy. The sound library uses a shared limiter to reduce overload, but a limiter is not a hearing-safety meter. Begin low, add one layer at a time and take regular quiet breaks.
Simple warning signs
Pain, pressure, ringing, temporary dullness or a need to raise the level after listening are reasons to stop. Persistent or sudden hearing changes need advice from a qualified healthcare professional.