WordNet

the number of observations in a given statistical category (同)absolute frequency
the number of occurrences within a given time period; "the frequency of modulation was 40 cycles per second"; "the frequency of his seizures increased as he grew older" (同)frequence, oftenness
the ratio of the number of observations in a statistical category to the total number of observations (同)relative frequency
an audible acoustic wave frequency (同)audio_frequency
the sound elements of television
the audible part of a transmitted signal; "they always raise the audio for commercials" (同)sound

PrepTutorEJDIC

可聴周波[数],低周波
〈U〉しばしば起こること,頻繁 / 〈C〉頻度数,(発生・生現などの)回数 / 〈C〉振動数;周波数
(電波の)可聴周波の,低周波の;(テレビの)音声の / (テレビの)音声[部門]

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/04/02 04:23:30」(JST)

wiki en

An audio frequency (abbreviation: AF) or audible frequency is characterized as a periodic vibration whose frequency is audible to the average human. The SI unit of audio frequency is the hertz (Hz). It is the property of sound that most determines pitch.^[1]

The generally accepted standard range of audible frequencies is 20 to 20,000 Hz,^[2]^[3]^[4] although the range of frequencies individuals hear is greatly influenced by environmental factors. Frequencies below 20 Hz are generally felt rather than heard, assuming the amplitude of the vibration is great enough. Frequencies above 20,000 Hz can sometimes be sensed by young people. High frequencies are the first to be affected by hearing loss due to age and/or prolonged exposure to very loud noises.^[5]

Frequencies and descriptions

Frequency (Hz)	Octave	Description
16 to 32	1st	The lower human threshold of hearing, and the lowest pedal notes of a pipe organ.
32 to 512	2nd to 5th	Rhythm frequencies, where the lower and upper bass notes lie.
512 to 2048	6th to 7th	Defines human speech intelligibility, gives a horn-like or tinny quality to sound.
2048 to 8192	8th to 9th	Gives presence to speech, where labial and fricative sounds lie.
8192 to 16384	10th	Brilliance, the sounds of bells and the ringing of cymbals and sibilance in speech.
16384 to 32768	11th	Beyond Brilliance, nebulous sounds approaching and just passing the upper human threshold of hearing

MIDI Note	Frequency (Hz)	Description	Sound File
C-1	8.18	Lowest organ note	N/A (fundamental frequency inaudible)
C0	16.35	Lowest note for tuba, large pipe organs, Bösendorfer Imperial Grand Piano	N/A (fundamental frequency inaudible under average conditions)
C1	32.70	Lowest C on a standard 88-key piano.
C2	65.41	Lowest note for cello
C3	130.81	Lowest note for viola, mandola
C4	261.63	Middle C
C5	523.25	C in middle of treble clef
C6	1046.50	Approximately the highest note reproducible by the average female human voice.
C7	2093	Highest note for a flute.
C8	4186	Highest note on a standard 88-key piano.
C9	8372
C10	16744	Approximately the tone that a typical CRT television emits while running.

References

^ Pilhofer, Michael (2007). Music Theory for Dummies. For Dummies. p. 97.
^ "Hyperphysics". Retrieved 19 September 2014.
^ Heffner, Henry; Heffner, Rickye (January 2007). "Hearing Ranges of Laboratory Animals". American Association for Laboratory Animal Science 46 (1): 20. Retrieved 19 September 2014.
^ Rosen, Stuart (2011). Signals and Systems for Speech and Hearing (2nd ed.). BRILL. p. 163. For auditory signals and human listeners, the accepted range is 20Hz to 20kHz, the limits of human hearing
^ Bitner-Glindzicz, M (2002). "Hereditary deafness and phenotyping in humans.". British medical bulletin 63 (1): 73–94. doi:10.1093/bmb/63.1.73. PMID 12324385. |access-date= requires |url= (help)

UpToDate Contents

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

1. 成人における高頻度人工呼吸 high frequency ventilation in adults
2. 新生児における機械的人工換気 mechanical ventilation in neonates
3. 院外における心臓植込み型電子デバイスと電磁場の相互作用 cardiac implantable electronic device interactions with electromagnetic fields in the non hospital environment
4. 気管支肺異形成症の予防 prevention of bronchopulmonary dysplasia
5. 機械的人工換気のモード modes of mechanical ventilation

English Journal

A 1-channel 3-band wide dynamic range compression chip for vibration transducer of implantable hearing AIDS.

Kim D, Seong K, Kim M, Cho J, Lee J.SourceDepartment of Electrical Engineering Graduate School, Kyungpook National University, Deagu, South Korea.
Bio-medical materials and engineering.Biomed Mater Eng.2014;24(1):1009-17. doi: 10.3233/BME-130898.
In this paper, a digital audio processing chip which uses a wide dynamic range compression (WDRC) algorithm is designed and implemented for implantable hearing aids system. The designed chip operates at a single voltage of 3.3V and drives a 16 bit parallel input and output at 32 kHz sample. The desi
PMID 24211991

Experimental and numerical assessment of low-frequency current distributions from UMTS and GSM mobile phones.

Gosselin MC, Kühn S, Kuster N.SourceFoundation for Research on Information Technologies in Society (IT'IS), Zeughausstrasse 43, 8004 Zurich, Switzerland. ETH Zurich, Zurich, Switzerland.
Physics in medicine and biology.Phys Med Biol.2013 Dec 7;58(23):8339-57. doi: 10.1088/0031-9155/58/23/8339. Epub 2013 Nov 11.
The evaluation of the exposure from mobile communication devices requires consideration of electromagnetic fields (EMFs) over a broad frequency range from dc to GHz. Mobile phones in operation have prominent spectral components in the low-frequency (LF) and radio-frequency (RF) ranges. While the exp
PMID 24216774

Solicitations in GP, nurse and pharmacist prescriber consultations: an observational study.

Weiss MC, Platt J, Riley R, Taylor G, Horrocks S, Taylor A.SourceDepartment of Pharmacy and Pharmacology, University of Bath, Bath.
Family practice.Fam Pract.2013 Dec;30(6):712-8. doi: 10.1093/fampra/cmt042. Epub 2013 Aug 10.
BACKGROUND: The opening solicitation is a key element of the primary care consultation as it enables patients to express their ideas, concerns and expectations that can lead to improved patient outcomes. However, in practice, this may not always occur. With nurses and pharmacists now able to prescri
PMID 23934144

Japanese Journal

Enhancing Stereo Signals with High-Order Ambisonics Spatial Information

IEICE Transactions on Information and Systems E99.D(1), 41-49, 2016
NAID 130005116192

Method of Audio Watermarking Based on Adaptive Phase Modulation

IEICE Transactions on Information and Systems E99.D(1), 92-101, 2016
NAID 130005116182

振幅変調に基づく音響電子透かしにおける周波数変換攻撃に耐性のある検出 (応用音響)

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 115(302), 47-52, 2015-11-12
NAID 40020676341

「frequency」

Sound measurements
Characteristic	Symbols
Sound pressure	p, SPL
Particle velocity	v, SVL
Particle displacement	δ
Sound intensity	I, SIL
Sound power	P, SWL
Sound energy	W
Sound energy density	w
Sound exposure	E, SEL
Acoustic impedance	Z
Speed of sound	c
Audio frequency	AF
Transmission loss	TL
	v; t; e;

　　[★]

n.

しばしば起こること/状態。頻発、頻繁(⇔infrequency)
頻度。(脈拍・訪問・乗り物の運搬などの)回数
(物理)振動数、周波数。(数学・統計)度数、頻度
(生態)一定区画における種の個体数、頻度(特定の種がその区域の中の小区分の何パーセントに出現したかを示す数値)
(医)頻尿(urinary frequency)

[1] Pilhofer, Michael (2007). Music Theory for Dummies. For Dummies. p. 97.

[2] "Hyperphysics". Retrieved 19 September 2014.

[3] Heffner, Henry; Heffner, Rickye (January 2007). "Hearing Ranges of Laboratory Animals". American Association for Laboratory Animal Science 46 (1): 20. Retrieved 19 September 2014.

[4] Rosen, Stuart (2011). Signals and Systems for Speech and Hearing (2nd ed.). BRILL. p. 163. For auditory signals and human listeners, the accepted range is 20Hz to 20kHz, the limits of human hearing

[5] Bitner-Glindzicz, M (2002). "Hereditary deafness and phenotyping in humans.". British medical bulletin 63 (1): 73–94. doi:10.1093/bmb/63.1.73. PMID 12324385. |access-date= requires |url= (help)

匿名

検索

案内

案内

audio frequency