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	Term	术语	Definition	定义
	sonic frequency	声频	See AUDIOFREQUENCY.	（人类）可听的频率范围，每秒约为20-20000赫兹。亦称sonic frequency。
	sonic line of position	声测位置线	A LINE OF POSITION determined by means of SOUND WAVES. Also called acoustic line of position.	以声波手段测定的位置线。亦称acoustic line of position。
	sonic navigation	声波导航	See NAVIGATION.	用声波方式进行的导航，不论该声波是否在可听范围。亦称acoustic line of position。
	sonic wave	声波	See WAVE: SOUND.	以一定速度穿过弹性介质的机械扰动，它包括介质中大多数质点的纵向位移，即包括平行于扰动前进方向�... more 以一定速度穿过弹性介质的机械扰动，它包括介质中大多数质点的纵向位移，即包括平行于扰动前进方向的压缩位移和澎涨位移，它是一种纵波。亦称sonic wave, or acoustic wave。
	sono-buoy	声纳浮标	A BUOY with equipment for automatically transmitting a radio signal when triggered by an underwater SOUND SIGNAL.	带有自动发射无线电信号装置的浮标，由水下音信号触发。
	sono-radio buoy	声纳无线电浮标	See SONOBUOY.	带有自动发射无线电信号装置的浮标，由水下音信号触发。
	sound	海峡，海湾；声音，音响	A relatively long ARM OF THE SEA forming a CHANNEL between an ISLAND and a MAINLAND or connecting two larger bodies of water, as a SEA and t... more A relatively long ARM OF THE SEA forming a CHANNEL between an ISLAND and a MAINLAND or connecting two larger bodies of water, as a SEA and the OCEAN, or two parts of the same body but usually wider and more extensive than a STRAIT. A vibratory disturbance in air or some other elastic medium, capable of being heard by the human ear, and thus of any FREQUENCY between about 20 and 20,000 CYCLES PER SECOND.	较长的海湾，它在岛屿与大陆之间形成水道；或连接两种巨大水体，如海与洋；或连接同类水体的两部分�... more 较长的海湾，它在岛屿与大陆之间形成水道；或连接两种巨大水体，如海与洋；或连接同类水体的两部分。通常比海峡更宽广，开阔。空气或其它弹性媒质的震荡扰动，人耳可以听见，即约20-20000赫兹间的任何频率。
	sound	测深	(v.i.). To measure the DEPTH of the water.	测量水的深度。
	sound buoy	音响浮标	See BUOY.	装有特有的声响信号的浮标，声响浮标可根据发声方式进一步分类，如钟、锣、雾角、雾号或哨浮标等。
	sound channel	声频通道，伴音通（信）道	The region in the water column where SOUND VELOCITY first decreases to a minimum value with DEPTH and then increases in value as a result of... more The region in the water column where SOUND VELOCITY first decreases to a minimum value with DEPTH and then increases in value as a result of pressure. Above the minimum value SOUND RAYS are bent downward, and below the minimum value SOUND RAYS are bent upward; the RAYS are thus trapped in this CHANNEL. SOUND travelling in a deep channel can be detected thousands of MILES from the sound source.	指某一海水层，在该水层中，声速首先随深度的增加降低到最小值，然后又因压力作用而增大。在该最小�... more 指某一海水层，在该水层中，声速首先随深度的增加降低到最小值，然后又因压力作用而增大。在该最小值以上，声射线向下弯曲。在最小值以下，声射线向上弯曲。这样，射线被抑制在该通道内。在深层通道传播的声音，可在声源数千英里以外探测到。
	sounder	（回声）测深仪	A machine or apparatus for SOUNDING. An ECHO SOUNDER.	用于水深测量的仪器或装置。回声测深仪。
	sounder: echo	回声测深仪	See ECHO SOUNDER.	一种通过测量声波或者超声波信号发射和回声信号从水底返回的时间间隔确定水深的仪器。也称之为echo sou... more 一种通过测量声波或者超声波信号发射和回声信号从水底返回的时间间隔确定水深的仪器。也称之为echo sounding instrument （回声测深工具（或者设备）），sonic depth finder（声波测深仪）或者ultrasonic depth finder（超声波测深仪）。也可参见SUB-BOTTOM PROFILER（海底地层剖面仪），swath(e) sounding system（侧扫声呐系统）。
	sounding	水深；测深，水深测量；高空气象观测，探空	Measured or charted DEPTH of water, or the measurement of such a DEPTH. In METEOROLOGY, determination of one or several upper-air meteorol... more Measured or charted DEPTH of water, or the measurement of such a DEPTH. In METEOROLOGY, determination of one or several upper-air meteorological elements by means of instruments carried up by balloon, aircraft, kite, glider, ROCKET, SATELLITE, etc.	测量的或测绘的水体深度，或指这种深度的测量。在气象学中，指测量一种或数种高空气象要素，通常通... more 测量的或测绘的水体深度，或指这种深度的测量。在气象学中，指测量一种或数种高空气象要素，通常通过气球、飞机、风筝、火箭、人造卫星等携带仪器进行探测。
	sounding: acoustic	声波测深，回声测深	See ECHO SOUNDING.	参见echo sounding（回声测深）。
	sounding: danger	危险水深	A minimum SOUNDING chosen for a vessel of specific DRAFT in a given area to indicate the limit of safe NAVIGATION.	在给定区域内为特定的船舶选取的最小水深值，以指示船舶安全航行的水深。
	sounding(s): detached	NULL	Those SOUNDINGS, including least DEPTHS on SHOALS, whose POSITIONS were accurately located. See POSITION: DETACHED.	NULL
	sounding: doubtful	可疑水深	A DEPTH shown on a CHART over a SHOAL, a ROCK, etc., that may be less than that indicated.	在海图上显示在礁石、浅滩等上面的水深，可能比实际水深值小。
	sounding: drift	漂移测深	A method of finding the least DEPTH in a shoal area by letting the boat drift along a series of closely spaced, previously run parallel SOUN... more A method of finding the least DEPTH in a shoal area by letting the boat drift along a series of closely spaced, previously run parallel SOUNDING LINES, while the LEADSMAN sounds or 'feels' along the BOTTOM. The operation is repeated until the SHOAL is found or the area is covered.	用于探测浅水区中最浅深度的方法，实施方式为使用小艇在预先测过的水深线间沿一系列小间隔线缓缓偏�... more 用于探测浅水区中最浅深度的方法，实施方式为使用小艇在预先测过的水深线间沿一系列小间隔线缓缓偏移，此时测量员实施锤测或杆测。如此重复进行，至发现浅滩或遍及全区为止。
	sounding: echo	回声测深	See ECHO SOUNDING.	通过测量声波或者超声波信号发射和回声信号从水底返回的时间间隔来确定水深的技术。也称为声波测深�... more 通过测量声波或者超声波信号发射和回声信号从水底返回的时间间隔来确定水深的技术。也称为声波测深。亦可参见echo sounder（回声测深仪）。
	sounding: fixed angle	NULL	A method consisting in sounding along the arcs of circles subtended by two objects whose POSITION is known. For each arc, an angle remains... more A method consisting in sounding along the arcs of circles subtended by two objects whose POSITION is known. For each arc, an angle remains constant (fixed angle) and the second angle, between another pair of objects, defines the POSITION of the vessel along the arc. By varying the fixed angle successively by equal amounts, a series of LINES OF SOUNDING covering the area systematically can be run. See FIXED ANGLE PLOT.	NULL
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