Smoke Alarm Detector Invention Patent

Features: Different from the 3~3.2KHz, 85dB products on the market, this product can reach 80db, 520HZ@3m, ultra-low frequency, which is the frequency that the current research finds elderly and impaired people can wake up in sleep. Traditional 520hz product uses dynamic speaker with a power of 2~2.5W to achieve the require SPL and the circuit design is more expensive. Our piezo speaker only uses 1W to reach 80dB. Although TDK currently have similar functional products, they are only held in the research and development stage because the cost is too high to achieve mass production.