Just before noon on January 7, 2017, I made a field recording in a large park along Yasugawa in Shiga Prefecture, Japan (野洲川立入河川公園). The recording was made with a small Sony PCM-M10 digital recorder mounted on a tripod near the lower end of the park. I chose this location in order to reduce traffic and train noises from bridges upstream, as well as the rumble of water at a dam downstream. I pointed the microphones southeast toward Mikamiyama.
We can hear the rumble of a nearby dam, traffic, crows, and kids playing in the distance. These sounds are overwhelmed by a recorded public address message broadcast from speakers on a small building on the embankment above the park. The recorded message asks people to obey park rules: no golf, RC cars or aircraft, fireworks, unleashed dogs, fires, littering, or other activities that may disturb people. The same loud recorded message dominates the sonic environment of the park once every hour.
I often visit this park to look for birds. Egrets, herons, cormorants, and ducks can be found in the river both above and below the dam, and many small birds live in the vegetation along the riverbank.
On January 7th, as I was recording, I walked upstream and saw a few birds.
Activity in this park varies a lot, depending on the season, the weather, and the day of the week. But whatever they are doing, everyone in the park hears the same loud recorded message once every hour.