StreetSounds™

What kind of audio can I send on the StreetSounds™ system?

StreetSounds™ is a “real-time” streaming stereo audio system that produces very high quality audio (pro-audio) transmissions. “Real time” means that the system acts like a “PA” (public address) system and sends audio with less than 35msec of delay from one location to the next. This is very different from other systems in which the audio is sent via Wi-Fi as a “file” (i.e. mp3, AAC, WMA) and then played when someone hits the “Play” button. StreetSounds™ is like having your own local radio station.

How many StreetSounds™ units will I need for my 2-block downtown Main Street area?

We typically estimate that the units should range from 75’ to 100’ apart to provide good sound coverage. Since most city blocks in smaller towns are less than 300’ in length, you would need two to three StreetSounds™ unit per block if all units were placed on the same side of the street. If you want sound coverage on both sides of the street, you could either “zig-zag” the installations, or install additional units on the other side of the street. 

Do the StreetSounds™ systems require AC power?

Yes. The STS-70-205 requires either 110VAC or 220VAC. This power is generally available on a typical streetlight pole. Some streetlight poles already have AC outlets which significantly simplifies the installation of the StreetSounds™ unit. If an AC outlet is not already present on your streetlight pole, you will need to have one installed by a qualified electrician. The average power required is typically less than 10 watts when music is being played at a moderate level, but will not exceed 100 watts maximum.

 Is there Master transmitter

Yes. A StreetSounds™ “network” consists on one “Master” transmitter and one or more “Remote” or “Relay” units. The Master can be located anywhere within radio range of a StreetSounds™ unit. As long as the Master can reach at least one StreetSounds™ location, the signal will be relayed to each of the other Remote units. Since each StreetSounds™ radio is a “repeater” the signal will be sent from one pole to the next, creating an almost unlimited range of radio coverage. You can even go around corners of the block to reach business areas that are not located on the Main Street. 

Does StreetSounds™ transmit on Wi-Fi (or Bluetooth, or ZigBee)?

No. StreetSounds™ uses the 900 MHz unlicensed frequency band which is much less crowded than 2.4 GHz or 5 GHz Wi-Fi bands. Signals at 900 MHz travel much further than 2.4GHz or 5GHz and can penetrate “obstructions” such as trees, people, and buildings much better that the higher frequencies. Also, AirNetix has developed a proprietary radio transmission protocol that is designed SPECIFICALLY for high-quality, real-time audio transmission. In fact, the predecessor to StreetSounds™, the ARX-900 AiRocks Pro, uses this same wireless audio transmission technique and has been serving the (very picky) pro-audio market for the past two years. The system is very robust and does not depend on Wi-Fi to carry the signal.  Wi-Fi is not well suited to carrying real-time audio signals especially during periods of network congestion. Bluetooth is better suited for audio, but cannot “broadcast” or “relay” the signal like StreetSounds™. ZigBee is a “best effort”, packet-oriented system like Wi-Fi and is not well-suited to real-time transmissions.

Can the StreetSounds™ remotes units be turned on and off automatically? 

 Yes. The StreetSounds™ system includes a "Scheduler" that lets you control up to six "zones" or groups of radios automatically based on time of day and day of week. The Scheduler will turn on or off zones at any time you choose during any day of the week. 

How do we install the StreetSounds™ remote units?

The StreetSounds™ STS-70-205 includes a stainless steel mounting bracket that is designed to be installed on a 4” to 6” pole with two metal straps. If an AC power plug is available on the streetlight pole, all you need to do is attach the STS-70-205 to the pole with two metal bands (i.e.    ) and plug in the AC power cord. That’s it! The system has been designed so that most Public Works personnel can easily install the system with minimal equipment or cost.

Is there an Alarm monitor in the StreetSounds™ system.? 

Yes. StreetSounds™ includes an Alarm monitor system that keeps an eye on several critical functions and sends the operator a text and/or email message if something isn't working correctly. 

How much power can the StreetSounds™ system provide?

StreetSounds™ includes a two-channel audio amplifier that is capable of providing 35 watts RMS per channel (x2) into an 8 ohm speaker, producing 70 watts RMS into two 8 ohm speakers. A total of 100 watts RMS is available if you use 4 ohms speakers or multiple parallel 8 ohm speakers. 

Can I move the StreetSounds™ unit after installation if I don’t like the sound coverage?

Yes. StreetSounds™ are very flexible and can be moved to change or improve sound coverage after initial installation. You could install the system in one configuration for a while, then change locations of units if you like. The system is very flexible.

What is the transmission range of the radio?

The average radio range is between 600’ and 800’ with standard antennas, limited obstructions, and no interference. However, the typical placement of StreetSounds™ units is 75’ to 100’ apart on the average city block. The more important consideration is the range, or coverage, of the sound. This will normally dictate where the StreetSounds™ units are mounted. Radio range is not normally as important as sound coverage.

Can I use different speakers on the StreetSounds™ unit?

Yes. StreetSounds™ is capable of driving any 8 ohm or 4 ohm speaker. You could even use StreetSounds™ to drive “landscape” or buried speakers. Care should be taking to properly wire series and parallel connections of speakers. Consult AirNetix with any concerns or questions.

Can I add more StreetSounds™ units if I want to expand my coverage area?

Yes, you can add as many StreetSounds™ radios as you like. Each StreetSounds™ radio is a “repeater” so it will re-transmit the radio signal to units that are further away. This way, you can start with just a few StreetSounds™ units and add more as budget becomes available. The only “range” that really matters is the distance between two adjacent StreetSounds™ units.

Can I monitor and control the Remote StreetSounds™ units?

Yes. The StreetSounds™ system includes a comprehensive Network Management System (NMS) that runs on a standard Windows PC. The NMS gives the operator full visibility and control over each remote unit in the network. You can see, in real time, if the remote unit is working properly. You can also control the volume at each remote from the NMS screen.

Can I move the Master transmitter?

Yes. You can use the Master at its normal location (i.e. in a street side office) during a typical business day, and then move the Master to a different location if there is an event, such as a parade or festival. For example, if there is a festival with a band, you could temporarily move the Master to the stage and send the band’s music (at much lower audio levels!) all along the street. This could also be used as a temporary “announce” location for “lost and found” or emergency communications such as “lost child” or “emergency vehicle” announcements.

Are the StreetSounds™ products weatherproof?

Yes. The STS-70 radio is fully weatherproof and is housed in an aluminum enclosure that is IP65 rated. The speakers supplied with the STS-70-205 are also fully weatherproof and include an IP54 rating. Both are meant for permanent outdoor installation.

What about theft?

Theft will always be a valid concern with any outdoor-mounted equipment. However, StreetSounds™ units include anti-theft hardware on all accessible fastener locations. Special tools are required to remove these fasteners.

How do I install a StreetSounds™ unit on a street light pole? 

A. Click on the video below.

 

Is the StreetSounds™ system Stereo?

Yes. StreetSounds™ has two audio channels that can be used to send a stereo audio signal. However, the two audio channels don’t necessarily have to be used for a stereo audio. You could use the two channels for completely different audio content (i.e. music + paging).