Sound Recording Solutions
Sound Card Recorder
Powerful voice activated microphone recorder for Windows. Click here to learn more.Pink Noise
Pink noise, also known as 1/f noise, is a signal or process with a frequency spectrum such that the power spectral density is proportional to the reciprocal of the frequency. Sometimes pronounced as one over f noise, it is also called flicker noise. It is a sound whose power falls off as frequency increases. It occurs in many fields of study and takes its name as being intermediate between white noise and red noise. There is equal energy in all octaves. In terms of power at a constant bandwidth, 1/f noise falls off at 3 dB per octave. The human auditory system, which uses a roughly logarithmic concept of frequency approximated by the Bark scale, does not perceive all audible frequencies with equal sensitivity; signals at about 1 kHz appear to be loudest, and the 'loudness' of other frequencies appears to drop as the frequency changes from the 1 kHz 'peak'. However, humans may still differentiate between white noise and pink noise with ease. Graphic equalizers also divide signals into bands logarithmically and report power by octaves; audio engineers put pink noise through a system to test whether it has a flat frequency response in the useful spectrum. 1/f noise occurs in many physical, biological and economic systems. In physical systems it is present in some meteorological data series, the electromagnetic radiation output of some astronomical bodies, and in most electronic devices. In biological systems it is present in heart beat rhythms and the statistics of DNA sequences. Pink noise is also found in many electrical readings of the human brain. In financial systems it is often referred to as a long memory effect. Some researchers describe it is as being ubiquitous. It should be noted that at high enough frequencies 1/f noise is never dominant. There are many theories of the origin of 1/f noise. Some theories attempt to be universal, while others are only applicable to a certain type of material, such as semiconductors. Universal theories of 1/f noise are still a matter of current research.
Phone Call Recorder
Must have software for voice modem. Record all phone calls automatically, watch Caller ID information, create you own powerful answering machine. Perfect sound quality. Click here to learn more.3d audio effect - 3gp - a-law - aac - acm - adc - aiff - aliasing - amplifier - amr-wb - amr-wb plus - amr - apev2 tag - asf - atrac - audio codec - audio compression - avi - bitrate - bitrate peeling - chord - codec - comfort noise - compact audio cassette - compact disc - compression - compression artifact - compression ratio - contact microphone - container format - dab - data compression - digital audio - digital camera - divx - dolby digital - dolby digital plus - dsp - dvd-audio - dvd - effects unit - equalization - ffmpeg - flanging - fourcc - frequency spectrum - hi-fi - high-end audio - hiln - id3 - joint stereo - laser microphone - line level - lossy - loudspeaker - matroska - mcf - microphone - midi - mixing console - mp2 - mp3 - mp3 surround - mp3 sx - mp3pro - mp4 - mpeg-1 - mpeg-21 - mpeg-3 - mpeg-4 - mpeg-7 - mpeg - mu-law - musepack - music - mxf - nut - osm - parabolic microphone - pcm - perception - phonograph - pink noise - pqf - psychoacoustics - qdesign - quadraphonic - radio receiver - ratdvd - realaudio - red noise - reverberation - rhythm - ribbon microphone - riff - rmvb - sbr - signal processing - sound - sound card - sound effects - sound recording - spdif - speech encoding - speech recognition - speex - stereo - subwoofer - surround sound - synthesizer - tape recorder - tdm - tweeter - video - video compression - vob - voice analysis - vorbis - wav - white noise - wma - woofer