Here is the same recording, played at 3x speed, this affects the pitch of the recording and makes the sound stand out a lot more. It starts at low volume from the begining of the recording and, at this speed, stops at around 8.5s.Change the display to spectrogram and you can clearly see it...Here is the original recording;http://freesound.org/people/AlienXXX/sounds/348515/#descriptionRecorded from my bedroom at around 9-10pm. The windown was open.Does not sound like a car/motorbike/train/airplane. There is nothing in the room that would make any sound (refrigerator, air-conditioning, fan, etc).I don't know what it is.
神秘的不和諧humming_HP1kHz_x3speed.wav
聲道：2
類型：wav
dissonant、humming、mysterious、night、strange、recording、fast-forward、pitched-up、unknown
不搭調、低唱、神秘、晚、奇怪、記錄、快進、金字了、未知
資料來源：freesound ( https://freesound.org )

The sound of a drill drilling wood
Drill.wav
聲道：1
類型：wav
Drill、DIY、loud
鑽頭、DIY、響
資料來源：freesound ( https://freesound.org )

Heavy rain. Works well if looped.Recorded to tape with a JVC M-201 microphone around mid 1990s.Recording was done through my open window at home (in southwest Sweden) while this storm passed.Transferred to wav and edited with Audacity for Mac.
雨重Loopable.wav
聲道：2
類型：wav
field-recording、rain、loop、weather
現場記錄、雨、循環、天氣
資料來源：freesound ( https://freesound.org )

Closeup recording of the backside of a tower PC, fans and the harddrive can be heard. Neighbor is banging around, you may need to loop a smaller part. FLAC file test for the first time.
PC風扇和硬盤特寫
聲道：2
類型：flac
ambient、background、fan、computer、PC、drone、hum、noise
周圍、背景、凡、電腦、個人計算機、無人駕駛飛機、哼、噪聲
資料來源：freesound ( https://freesound.org )

This is the second version without the mechanical bolt. Maybe can be used for bolt action rifles.Made this is ableton live, it is multilayered with the top end of a 9mm and the low end of an. Another carbine sound is faded in after the transients to give more sustain. Two reverbs fade in and out creating a smooth transition and blend. A little white noise is added for subtle sheen and air.All the layers were grouped together into a single band compressor and ran through serum fx distortion and then into a krush distortion plugin for added fatness. A blending reverb was used to glue the sounds into the same space and ran into a final transient designer which is adding a little more snap and punch and clipping the excess transients off.enjoy
槍型2帶前進螺栓
聲道：2
類型：wav
rifle、gun、shot、assault、military
步槍、滾、射擊、突擊、軍事
資料來源：freesound ( https://freesound.org )

a sound for a user interface in a game
Beep_06_strong_2015-06-22.wav
聲道：1
類型：wav
click、videogam、user-interface、game、beep
點擊、電子遊戲、用戶界面、遊戲、嘟
資料來源：freesound ( https://freesound.org )

Sound from pack: "Mobile Arcade"100% FREE!200 HQ SFX, and loops.Best used for match3, platformer, runners.I sincerely hope that this is a little bit help you to add some fresh sound for Mobile or PC game project.All audio samples developed based on Reaktor 6 by Native Instruments.For crystalling clear and unique sound effect, I polished all audio samples in the Sony Sound Forge Pro 11.More content you may found on my site: stormgs.com
MA_SFX_SysEnter_7.wav
聲道：2
類型：wav
electric、loop、abstract、freaky、free-music、digital、soundeffect、sound-design、future、glitch、machine、effect、lo-fi、electronic、fx、sfx、sci-fi、game-sfx、noise
電動、循環、抽象、辣媽、免費音樂、數字、音效、音響設計、未來、毛刺、機、影響、路飛、電子、例如、SFX、科幻、遊戲SFX、噪聲
資料來源：freesound ( https://freesound.org )

A pipe in Leichhardt
Pipe.wav
聲道：2
類型：wav
Sydney、Australia、Leichhardt、Pipe
悉尼、澳大利亞、萊卡特、管
資料來源：freesound ( https://freesound.org )

"...and hail weighing xx centners fell from the sky upon the humans...". Revelations. I don't know how much one centner is, but someone told me it was many kilograms. Such ice pcs falling with a speed of 250 kilometers/hr must be extremly destructive.
armageddonhail.wav
聲道：2
類型：wav
Armageddon、weather、microburst、catastroph、calamity、thunderstorm
世界末日、天氣、微爆、Ktstrof、災害、雷雨
資料來源：freesound ( https://freesound.org )

Weird little rhytmic-melodic part. 120 bpm. Recorded in Cubase.My profile-info/other stuff.
bipolar.wav
聲道：2
類型：wav
Alien、drama、Sci-fi、Ambient、Noise、trance、video-games-development、games、action、Echo、Weird、Future、Machine、voices、hounted、Ambiance、UFO、Space、Sci-Fi、anticipation、Synthetic
外僑、戲劇、科幻、周圍、噪聲、發呆、視頻遊戲開發、遊戲、行動、迴聲、奇怪的、未來、機、聲音、鬧鬼、氣氛、飛碟、空間、科幻、預期、合成的
資料來源：freesound ( https://freesound.org )