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Why are police choppers so loud? 警方直升機為什麼這麼大聲?¿Porqué los helicópteros de la policía meten tanto ruido?

Question | 問題:

Why are the police helicopters that fly around Alhambra at night so loud?  Are these Alhambra related police activities, or instead at the initiation of other agencies?

為什麼警用直升機在阿罕布拉市周圍夜間飛行這麼大聲? 這些是阿罕布拉市警方的相關活動或者是其他機構發起的?

Answer | 答:

Photos from Pasadena Police Department websiteHelicopter support in Alhambra is provided by F.A.S.T. also known as Foothill Air Support Team.  The Alhambra Police Department has partnered with F.A.S.T since 2001. F.A.S.T. covers several cities from Alhambra, across the San Gabriel Valley to Pomona. Officers from various jurisdictions work as the pilots and as observers on several different helicopters. The helicopters that patrol and assist ground units in Alhambra are most often requested by the ground units. Air support is brought in on serious or rapidly evolving incidents such as pursuits, crimes in progress or critical missing persons.

在阿罕布拉市直升機由山麓空中支援隊(又稱FAST)提供。自2001年以來,阿罕布拉警察署已與FAST合作。 FAST涵蓋整個聖蓋博谷的幾個城市,從阿罕布拉到波莫納跨越聖蓋博谷。來自不同司法管轄區的警員,作為觀察員和飛行員在操作多架不同的直升機。在阿罕布拉地面部隊要求下,直升機飛行員巡邏並協助他們。在嚴重案件或事件迅速演變時,空中支援的介入有助於追擊,罪案發生中和重要失踪人員的案件。

A helicopter offers a unique and valuable tool for law enforcement. Ground units, with the assistance of air support, have the ability to search a large area in a short amount of time. Alhambra PD officers can “down link” with the helicopter so ground units can often see what the pilot is seeing in real time and incidents can be recorded as well. Helicopters also use infrared that allows the police to look for and track suspects in complete darkness.


Nevertheless, helicopters do make noise. To address this issue, F.A.S.T. has deployed a helicopter called the MD 500 E. This helicopter is much quieter than other helicopters in the fleet and is used almost exclusively at night. Other helicopters such as the Bell OH 58 or Bell Jet Ranger have been fitted with sophisticated cameras and high powered lights that allow them to do their job at a higher altitude, which reduces the noise on the ground. These helicopters are also fitted with special tail rotors that also help reduce noise.

然而,直升機也製造噪音。為了解決這個問題,FAST已部署了MD500E 直升機。這架直升機是比其他在支隊直升機安靜,也幾乎完全是在夜間使用。其他如貝爾OH58或貝爾Jet Ranger直升機還配備了先進的攝像機和高燈,讓他們工作在一個更高的高度,從而降低了地面上的噪聲。這些直升機還配備了特殊的尾旋翼,也有助於降低噪音。

Alhambra Police officers take into consideration several factors before calling in air support, such as the time of day and the seriousness of the incident. We try to balance crime prevention, suspect apprehension and service to our residents with the peace and serenity of our community.  

在空中支援時,阿罕布拉警方人員需要考慮幾個因素,如一天的時段和事件的嚴 重性。求助前,我們試圖平衡預防犯罪,犯罪嫌疑人的逮捕和服務,還有與我們 的社區的和平與安寧,還有我們的居民關係。 

¿Porqué los helicópteros de la policía que sobrevuelan Alhambra metentanto ruido?¿Son acaso actividades directamente relacionadas con Alhambra, o sonactividades de iniciación de otras agencias?Respuesta:El apoyo de los helicópteros en Alhambra es otorgado por F.A.S.T. oFoothill Air Support Team. El Departamento de Policía de Alhambra estáasociado con F.A.S.T desde el año 2001 quienes cubren  variasciudades, desde Alhambra, cruzando el Valle de San Gabriel hastaPomona.Oficiales de diversas jurisdicciones trabajan como pilotos yobservadores en distintos helicópteros que patrullan asistiendounidades terrestres de Alhambra.La asistencia por aire llega tras incidentes serios o de rápidaevolución como es el caso de las persecuciones, crímenes en proceso opersonas desaparecidas.Un helicóptero se transforma en un elemento único y valioso para elcumplimiento de la ley.Las unidades terrestres, en conjunto con el apoyo aéreo, tienen lacapacidad de rastrear grandes territorios en poco tiempo.La policía de Alhambra puede "conectar" los helicópteros con lasunidades terrestres para que ellos puedan observar directamente y entiempo real las imágenes desde el aire, las que al mismo tiempo puedenser grabadas. Además, los helicópteros utilizan una luz infraroja quepermite a la policía buscar y encontrar sospechosos en la más completaoscuridad.En todo caso, es cierto que los helicópteros son ruidosos. Parasolucionar este problema, F.A.S.T. ha incorporado un nuevo helicópterollamado MD 500 E. Este es mucho más silencioso y se utiliza casiexclusivamente por las noches.A otros helicópteros como el Bell OH 58, o el Bell Jet Ranger se leshan incorporado sofisticadas cámaras y potentes luces que les permitenhacer su trabajo a mayor altura, con el objetivo de disminuir el ruidooído desde la tierra. Además, estos helicópteros están previstos conrotores de cola especiales que también ayudan a disminuir los sonidosmolestos.Los oficiales de la policía de Alhambra toman en consideracióndiversos factores antes de llamar a apoyo aéreo. Algunos son: La horadel día y la gravedad del incidente. Tratan de poner sobre la balanza,por un lado, la prevención del crimen, los arrestos de sospechosos yel servicio a los residentes, y por el otro, la paz y la serenidad dela comunidad.

We ask the Alhambra Police Department your questions. What do you want to know? Submit below in the comments or e-mail [email protected] and we will do our best to get you answers.我們为您問阿罕布拉警察局。你想知道什麼?在下面提交您的意见(評論)或发電子郵件到[email protected]我們將竭盡所能來得到答案。

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2 thoughts on “Why are police choppers so loud? 警方直升機為什麼這麼大聲?¿Porqué los helicópteros de la policía meten tanto ruido?”

  1. Thanks Juan for the input! Spanish translation is on the way.

  2. Can you please post it in Spanish too?