What's that noise?

[kas1263]

Sometimes when I listen to my BCD436 I hear a noise on stations that can be best described as either a machine gun or jack hammer sound. Anyone have any idea of what it might be?

 

[RonnieUSA]

Sometimes when I listen to my BCD436 I hear a noise on stations that can be best described as either a machine gun or jack hammer sound. Anyone have any idea of what it might be?

machine gun = NXDN
jack hammer = DMR(MotoTrbo)

http://www.kb9ukd.com/digital/

 

[kas1263]

I wasn't able to get the Mp3's to play but I looked them up on your site. I'm getting these sounds on the U.S. Penitentiary frequencies in Martin County, Kentucky. I am wondering why?

 

[RonnieUSA]

I wasn't able to get the Mp3's to play but I looked them up on your site. I'm getting these sounds on the U.S. Penitentiary frequencies in Martin County, Kentucky. I am wondering why?

The Database shows it as a:
System Type: Motorola Type II SmartZone
System Voice: APCO-25 Common Air Interface Exclusive

US Penitentiary Big Sandy Trunking System, Inez, Kentucky - Scanner Frequencies

 

[smithken]

I wasn't able to get the Mp3's to play but I looked them up on your site. I'm getting these sounds on the U.S. Penitentiary frequencies in Martin County, Kentucky. I am wondering why?

They're not MP3s, they are .wav files.

 

[W8RMH]

I wasn't able to get the Mp3's to play but I looked them up on your site. I'm getting these sounds on the U.S. Penitentiary frequencies in Martin County, Kentucky. I am wondering why?

That is what digital signals sound like on an analog scanner which is unable to decode them and provide the audio.