![]() ![]() Radio stations usually play a loop of music. The emergency program contains at least some generic audio (and video) with a station identification. ![]() ≤ −70 dB and (if applicable) static/no picture for 30 seconds, an emergency program is cued. In the event of dead air lasting more than an acceptable duration, e.g. Many broadcasters install a silence detector independently operating from their broadcasting headquarters. Prior to Super Bowl XLV, Green Bay, Wisconsin, radio station WCHK-FM announced that it would intentionally go to dead air during the game, since the hometown Packers were playing in the game and station management believed nobody would be listening to music while the Super Bowl was being broadcast on another station. The network blamed "a brief equipment failure." NBC reported that no commercial advertising was lost. ![]() One significant case of dead air occurred during Super Bowl LII in 2018, when the NBC television broadcast experienced 26 seconds of dead air during a commercial break. CBS affiliates criticized Rather for the incident. The network broadcast six minutes of dead air before Rather was found and returned to the studio. The match then ended sooner than expected but Rather was gone. Open tennis match threatened to delay the start of his news broadcast. On September 11, 1987, Dan Rather walked off the set of the CBS Evening News when a late running U.S. According to the FCC, a station has a 30-day limit for going silent without approval. In the U.S., prolonged dead air, such as a shutdown occurring without permission, is an actionable offense that can result in fines from the Federal Communications Commission (FCC). Broadcast regulations īroadcast stations can use programmable devices known as "silence sensors", "off air alarms" or "silence monitors" that will sound an alarm and alert personnel if dead air persists more than a few seconds. Such a broadcast transmitter is said to have gone " dark". "closed", " signed off" or " off the air", by a control operator. The term "dead air" does not refer to a broadcast transmitter that is intentionally shut down, i.e. Moreover, dead air may impact advertising revenue if it affects the airplay of paid commercials. Among professional broadcasters, dead air is considered one of the worst things that can occur. However, the term "dead air" is most often used in cases where program material comes to an unexpected halt, either through operator error or technical malfunction. Television directors may use the command "fade to black" or "to black" to indicate a momentary transition to a completely black image. In radio, the result is silence, and in television, the result is a silent black or gray screen. However, a carrier wave is still transmitting. In television broadcasting, the term denotes the absence of both audio and video program material. Radio and television ĭead air occurs in radio broadcasting when no audio program is transmitted for an extended period of time, usually more than a few seconds. How effective either app is will depend on how you use it.Dead air is an unintended period of silence that interrupts a broadcast during which no audio or video program material is transmitted. But if this is too much of a good thing for you, Radio Silence now offers an alternative, though it is less comprehensive. While it can be annoying, it's important to realize that it's not Little Snitch that's causing the problem - its all the various apps and system functions that want or require internet access. Which app is best for you depends, basically, on your level of paranoia. But it's far more thorough and, ultimately, provides a much higher level of monitoring and security. Little Snitch, on the other hand, is far more granular, filtering all outbound traffic and asking you to set up a rule for each distinct instance. This is fine if you are concerned about specific applications. With Radio Silence you choose the apps you don't want to phone home. There appear to be significant differences between Radio Silence and Little Snitch. ![]()
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