Digital programmable hearing aids use digitized sound processing to convert sound waves into digital signals. A computer chip determines whether the signals are speech or noise and converts them into clear, amplified signals. Advantages in digital processing are significant: it offers improved programming ability, a more precise fit and a number of features designed to improve or enhance functionality, including: Gain processing reduces background sounds and microphone noise to offer a clearer sound for the listener, with less clinical adjustment needed. Digital feedback reduction (DFR) relies on cancellation systems to eliminate or reduce feedback. Digital noise reduction (DNR) reduces background noises for improved speech recognition. Directional microphones utilize dual microphones, focusing one on the sound source while the other decreases background noise, to enable the user to better determine directionality. Wireless connectivity with Bluetooth devices provides great flexibility.