1. In particular they were very well known for the RB Ribbon microphone . 2. Ribbon microphones are still in demand today and come in many styles.3. Lip-ribbon microphones are more efficient at noise reduction at lower frequencies. 4. Walter H . Schottky and Erwin Gerlach co-invented the first ribbon microphone . 5. Ribbon microphones use a thin, usually corrugated metal ribbon suspended in a magnetic field.6. The development of ribbon tweeters has more or less followed the development of ribbon microphones . 7. The acoustic complexity of ribbon microphones is comparable to other types of air coupled transducers. 8. In ribbon microphones , a light metal ribbon is suspended between the poles of a magnet. 9. The dynamic or moving coil microphone was introduced around 1930 and the velocity or ribbon microphone in 1932. 10. Uptempo drum parts were recorded with closer microphones while " spacier sections " were recorded with ribbon microphones .