To guarantee the performance and safety of our ear defenders, JSP conducts thorough testing on every batch produced. Here’s an overview of the key stages involved:

1. Initial Sampling and Headband Force Test
   Samples are selected from each manufacturing batch. The first test measures the force exerted by the headband and the size of the ear pads. This ensures the ear defenders are comfortable and do not apply excessive pressure on the wearer’s head.
    
2. Insertion Loss Testing
   This test involves comparing sound levels across a range of frequencies with and without the ear defender in place over a microphone. While similar to attenuation testing, Insertion Loss uses artificial measurement techniques rather than the human ear. It provides an accurate indication of how much sound the ear defender can block.
    
3. Durability Testing
   The ear defenders are dropped and then placed on a vibrating steel plate for three hours. This checks that all components remain securely attached and structurally sound after physical stress.
    
4. Flexing and Heat Resistance Test
   The headband is flexed 1,000 times to simulate extended use. Following this, it is submerged in a water bath at 50°C for 24 hours. This test confirms the product can withstand demanding environmental conditions.
    
5. Re-testing for Consistency
   After all physical tests, the ear defenders are tested again for insertion loss and headband force. This ensures that the product's performance remains within the acceptable limits, even after rigorous testing.

Key points:

• JSP tests ear defenders from every production batch to ensure quality.
• Headband force and ear pad area are tested for user comfort.
• Insertion Loss testing checks sound protection using artificial measurements.
• Durability tests simulate physical stress and high temperatures.
• Final checks confirm performance remains consistent post-testing.

If you need further support, please contact our Technical Support Team or contact us via our WhatsApp.