The ZÖLLNER Makrofon
The Makrofon is a compressed air powered diaphragm sound transmitter. It is most commonly installed on board of all types of vessels , as well as on rail vehicles. Makrofons are reliable whistles distinguished by their low air consumption, strong sound intensity and wide range of audibility. Due to the simple and solid design, Makrofons are practically maintenance-free.
The diaphragm housings are made of reliable materials, seawater resistant plastic is used for the protective cover only. For vessels the sound frequencies of Makrofons range between 90 Hz and 370 Hz.
The following Makrofons are available:
Class I – Vessels of 200 metres or more in length
| ZM200/90B | Sound frequency 90 Hz | 143 dB in 1/3rd-octave band level at 1 m |
|---|---|---|
| ZM200/110B | Sound frequency 110 Hz | 143 dB in 1/3rd-octave band level at 1 m |
Class II – Vessels of 75 metres, but less than 200 metres in length
| M125/130B | Sound frequency 130 Hz | 138 dB in 1/3rd-octave band level at 1 m |
|---|---|---|
| M125/160B | Sound frequency 160 Hz | 138 dB in 1/3rd-octave band level at 1 m |
| M75F/260 | Sound frequency 260 Hz | 138 dB in 1/3rd-octave band level at 1 m |
Class III - Vessels of less than 75 metres in length
| M75F/260 | Sound frequency 260 Hz | 130 dB in 1/3rd-octave band level at 1 m |
|---|---|---|
| M75F/370 | Sound frequency 370 Hz | 130 dB in 1/3rd-octave band level at 1 m |
