Bilsom 303S vs Hearos Ultimate Softness Series - Comparison


The Hearos Ultimate Softness Series is a stronger earplug than the Bilsom 303S. Please have a look at the decibel comparison chart below. More decibel means stronger sound protection.

The individual reviews of each earplug are available here:
Bilsom 303S

Hearos Ultimate Softness Series


Bilsom 303SHearos Ultimate Softness Series
Brand:Howard LeightHearos


Bilsom 303S
Bilsom 303S picture of packagingBilsom 303S picture ear wearing , side view

Hearos Ultimate Softness Series
Hearos Ultimate Softness Series picture of packagingHearos Ultimate Softness Series picture ear wearing , side view ear wearing , side angle view

Attenuation (US Standard)

Attenuation according to measurment standard ANSI S3.19-1974

More decibel (dB) means more sound protection. More hertz (Hz) means a higher pitch sound.

Bilsom 303S vs Hearos Ultimate Softness Series attenuation decibel (db) comparison chart (graph)

Overall rating
Bilsom 303SHearos Ultimate Softness SeriesDifference
Attenuation by frequency
Bilsom 303S: dB34.4035.0036.2035.9036.4038.9039.8042.6043.00
Hearos Ultimate Softness Series: dB38.4040.3043.2041.8038.6045.0045.7049.6047.30
Difference: dB-4.00-5.30-7.00-5.90-2.20-6.10-5.90-7.00-4.30
Bilsom 303S: SD3.404.203.803.002.903.
Hearos Ultimate Softness Series: SD2.903.904.003.802.602.803.503.804.30
Difference: SD0.500.30-0.20-0.800.300.20-0.300.40-0.20
Bilsom 303S: dB less SD31.0030.8032.4032.9033.5035.9036.6038.4038.90
Hearos Ultimate Softness Series: dB less SD35.5036.4039.2038.0036.0042.2042.2045.8043.00
Difference: dB less SD-4.50-5.60-6.80-5.10-2.50-6.30-5.60-7.40-4.10

Source Bilsom 303S: Instruction Manual - Bilsom 303 (global). Retrieved from on 2016-08-01
Source Hearos Ultimate Softness Series: DAP World, Inc.. Packaging information. A picture of the packaging information is available here.