engine

Sound recording of MARTA bus engine as it was stopped near the MARTA Bankhead station: idle engine, pneumatic release of air, background birds and conversations. Transportation, accessibility improves Proctor Creek Greenway's welcoming culture. Recorded with iPhone 6s microphone.

Sound recording of a set of keys being inserted into an SUV ignition tumbler switch. After a second the key is turned which promotes the engine to turn on and a rhythmic beep to sound as the car begins to warm up and then settle. This was recorded on a rainy day, so there are faint sounds of rain droplets landing on the roof and hood of the car. The vehicle has around 86,000miles and is a 2012 Toyota Rav4.

Sound recording of a person getting off the Bull City Connector, a local bus in Durham, NC. As the bus comes to a stop, the door rattles and makes a ticking sound. The door clicks open, and the bus lets air out to lower itself for the person getting off. There is an announcement for the safety of the passengers, from both the inside and the outside of the bus. Air whooshes out as the break is released, and the bus leaves with a loud engine noise, getting quieter as the bus moves farther away. Recorded on a Zoom H4N.

A recording of the sound of a GE-90 Boeing 777 airplane engine as it takes off.

This recording gives us a variety of frequencies of one sound, which is really helpful when it comes to learning about sounds. By getting close to the source of the sound, the sound became louder and the frequency was higher. In contrast to when the distance between the sound source, in this case the bus, and the recording device (iPhone 6) increased, the sound was not as loud and the frequency of the sound was lower. While recording, I was holding the recording device in my hand and kept it as still as possible. I started by siting on the bench at the bus stop, but after a period of time I decided to get closer to the bus. The bus seemed like one of those old, public transportation buses, not one of the new, more modernized buses. Also this recording was recorded at night, approximately 8 PM.

The sound of a small car driving by on W. Markham Avenue bordering Duke University around 2:00pm. I stood still and held my recorder, an iPhone 6, at my waist while standing on the sidewalk next to the street as the car drove past me.

From the adjacent sidewalk, I took this sound recording of an articulated bus passing through the tunnel leading to Duke's East campus. The audio begins as the bus approaches the entrance of the tunnel. The noise intensifies as the bus proceeds to halfway point of the tunnel where I stood holding the mic and then fades as it exits. Recorded on iPhone 5.

Recording of a John Deere 630 tractor and John Deere 336 baler baling hay and kicking the bales into a wagon cart. Recorded and uploaded to YouTube by DanDem34.