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| 来源： | Freesound 前往原页面 查看译文 |
| 作者： | klankbeeld |
| 许可： | CC-BY 保留署名许可协议 |
| 描述： | A soundstudy. A new central (industrial) heating installation has been installed in the apartment complex in which I live. a friend of mine lives diagonally under the boiler room. He complained to me that he could not sleep because of the noise at night. 05 seconds Bedroom friend510 seconds Bedroom me1015 seconds Living room friend1520 seconds Living room me I live 100 meters away in the complex.I have taken measurements. In this file of 20 seconds you can hear and see the results. Because noise is a subjective experience, we have opted for a difference / reference measurement. You hear and see the difference in noise from both houses. We look for the striking differences in Level and Frequency values.As a sound example, an audio file has been created with intervals of 5 seconds. Alternately friend and me.The level settings of the equipment and the location and height of the microphones are exactly the same in both cases.There is a difference of both rooms measured because that can say something about the experience of sound. Experience sound note: (The loudness perceived by the human ear does not go the same with the exact size as the sound level.) Thus, a subjective doubling of the loudness appears to correspond with an increase of the sound level by 3 dB, so by a factor of 3 for the intensity. See a graph for db (A): https://nl.wikipedia.org/wiki/DB(A) ) The pump makes a noise at about 870 Hz. with my friend I measure a level of 21 dB. for me that is 38 dB.The lowfrequency noise (In dB (A) weight, lowfrequency noise is approximately 10 dB less annoying than the pump noise. After correction the pump noise is 11 dB compared to the lowfrequency noise of 16 dB. My friend experiences the pump noise about 3 times harder than the lowfrequency noise. Conclusion; No wonder he is not sleeping well after installing the new heating system. Used equipment;Sennheiser MKH30 and MKH50 in MS Midside setting.Sound Devices 302 pro field mixerTascam dr100 Mk2 recorder (set: 48 kHz / 24 bit)Sennheiser HD 25 70 Ohm headphones.All equipment has a flat frequency characteristic.Recording decoded in Audacity from Midside to STEREO to get a good impression of the sound experience. If any of these sounds have been of help, and you are feeling charitable, please do consider donating to Freesound to help keep the site running (a link is also on the home page). Any donations are greatly appreciated YOU ALWAYS HAVE TO CREDIT/ATTRIBUTE me (klankbeeld) and freesound.org in your work if you use this sound. Please do it like this if possible: https://freesound.org/people/klankbeeld/Thank you.This sound may NOT be used in (royalty free) stock material. Don't put my raw sounds/files on youtube or anywhere else. You can use them in creative way as a part of artform, but not "redistribute" as (royalty free) stock material. Thank you. |
| 标签： | backgroundsound industry roomnoise heating inside atmospheric building whitenoise Noise pumping vc roomtone ambience atmos pump machine system apartment ambient indoors ambiance generalnoise industrial atmosphere |
| 音频格式 | wav |
| 声音时长 | 00:20 |
| 文件大小 | 5.5 MB |
| 比特率 | 2306 kbps |
| 采样率 | 48000 Hz |
| 位深度 | 24 bit |
| 声道 | 立体声 |