G & F Products, Inc.
Attn: William Penn
Attenuation measurements have been performed according to the American National Standards Institue (ANSI) Specifications, ANSI S3.19-1974, using the experimenter-fit protocol, on the G & F Products Model 14040 earplugs (test ID Q3636A). The specified threshold measurement data were obtained using ten normally-hearing listeners, six male and four female. These listeners were selected from a standby group of about 35 volunteers who regularly serve as listeners for measurements of this kind.
The measurements were made in a room designed for this purpose. All acoustic characteristics of the room meet the requirements outlined in ANSI S3.19-1974. The ambient noise levels in this room are used on a continuing basis to monitor the background noise levels. An automatic recording attenuator was used to record both open and occluded ear thresholds. Each of ten subjects was tested three times at each of nine test frequencies.
32dB High Noise Reduction Rating
- Disco/KTV. 90dB, damage to the hearing. After 50dB, no damage to the hearing
- Airport: 80 89dB, unbearable. After 40dB, relatively quiet
- Bedroom facing to the street: 60 79dB, suffer insomnia. After 25dB, little quiet sound
- Noisy living room: 50 59dB, noisy. After 15dB, nearly silent
- Bedroom: 40dB, quiet/soft voice. After: -, silent
Note:
1. New Earplugs may have a little smell, which is normal and will not affect usage. The smell would usually go away in a couple of days.
2. Our G & F earplugs 32dB are sound-reducing, not soundproof.
3. Ear cushions and foam inserts will degrade over time, or in humid/extreme climate. Please discard and replace it as needed.
