کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7152015 1462369 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A wide-band in-air parametric array source composed of a circular plate with steps and a Langevin transducer with a horn
ترجمه فارسی عنوان
یک منبع آرایه پارامتریک در هوا که از یک صفحه دایره ای با مراحل و یک مبدل لانگوین با یک شاخ تشکیل شده است
کلمات کلیدی
مبدل گام پلاستیکی، منبع آرایه پارامتریک، پرتو صدا جهت دار، مراحل سه گانه،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
Parametric array (PA) sources generate a directional sound beam, via the PA phenomenon. Practical PA sources, such as PA loudspeakers, have high power consumption, low sound quality, and high cost. The stepped-plate transducer, which consists of a Langevin transducer, a horn, and a radiating plate with steps, can provide high-intensity sound and a highly directional sound beam in the acoustic axis. This study investigated the use of a stepped-plate transducer to make a PA source with high directivity and a wide bandwidth. A stepped-plate transducer that had two different resonance frequencies (f1 = 77.5 kHz, f2 = 87.4 kHz) was designed for wide bandwidth, and the three different heights of the steps on the plate (ts1 = 2.28 mm, ts2 = 2.14 mm, ts3 = 2.02 mm) were intended to provide high directivity sound beams. The fabricated stepped-plate transducer demonstrated a 50 ± 3 dB sound pressure level for the difference frequency wave in the 4-19 kHz frequency range (with equalization), and 4.2-5.1° of HPBW was shown for the highly directional sound beam.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Acoustics - Volume 141, 1 December 2018, Pages 223-233
نویسندگان
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