{"id":2361,"date":"2025-09-25T11:11:17","date_gmt":"2025-09-25T17:11:17","guid":{"rendered":"https:\/\/blog.faberacoustical.com\/wpblog\/?p=2361"},"modified":"2025-09-25T11:11:19","modified_gmt":"2025-09-25T17:11:19","slug":"measured-iphone-17-pro-microphone-frequency-response-and-directivity","status":"publish","type":"post","link":"https:\/\/blog.faberacoustical.com\/wpblog\/2025\/ios\/iphone\/measured-iphone-17-pro-microphone-frequency-response-and-directivity\/","title":{"rendered":"Measured: iPhone 17 Pro microphone frequency response and directivity"},"content":{"rendered":"\n

Frequency Response<\/h2>\n\n\n\n

I measured the frequency response of the iPhone 17 Pro microphone by positioning a lab-grade reference microphone (PCB model 378B02) approximately 1mm away from the phone (facing the mic) in our anechoic chamber. The reference mic was connected directly to input 1 of a model 485B39 dual channel USB interface. The iPhone microphone signal was routed directly to a USB-C to 3.5mm headphone adapter using SignalScope’s audio play through function (with measurement mode enabled) and from there to input 2 of the 485B39. The response between the 2 microphones was measured with SignalScope’s Dual FFT Analyzer (on a Mac) with the microphones facing toward and away from a loudspeaker which was generating a swept sine excitation signal. The 2 microphone jig was rotated 180 degrees between measurements and the individual measurements were then averaged. The average measurement was corrected with the factory-supplied frequency response of the reference microphone for both pressure and free-field acoustic sensitivity. The graph, below was generated with SignalScope.<\/p>\n\n\n\n

\"iPhone<\/a>
iPhone 17 Pro microphone frequency response, corrected with factory-supplied data for the pressure (blue) and free-field (green) response of the PCB 378B02 reference mic.<\/em><\/figcaption><\/figure>\n\n\n\n
\"iPhone<\/a><\/figure>\n\n\n\n

Directivity<\/h2>\n\n\n\n

One obvious change in the iPhone 17 Pro microphone is that it sits on the opposite side of the USB-C connector than in previous iPhone models.<\/p>\n\n\n\n

\"iPhone<\/a><\/figure>\n\n\n\n

Our automated directivity measurement system, built into our anechoic chamber, made it easy to account for the change in microphone location. The 1\/3 octave sound levels were measured as the phone was rotated around its microphone at 1.5 degree increments. A single, full-range, coaxial-driver loudspeaker generated the broadband test signal that ran for the duration of the measurements. Spectra in all resulting measurements were then accessed to generate a set of polar data for each frequency band. Several of these polar data sets were loaded into SignalScope’s Polar Plot tool to generate the graph, below.<\/p>\n\n\n\n

\"iPhone<\/a><\/figure>\n\n\n\n

Note:<\/strong> 1\/24-octave smoothing is applied to the frequency response data. No smoothing is applied to the polar plot data.<\/p>\n\n\n\n

\n
\n
\"\"<\/a><\/div>\n
Learn More About SignalScope X<\/a><\/div>\n<\/div>\n
Try It for Free\"\"<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Frequency Response I measured the frequency response of the iPhone 17 Pro microphone by positioning a lab-grade reference microphone (PCB model 378B02) approximately 1mm away from the phone (facing the mic) in our anechoic chamber. The reference mic was connected directly to input 1 of a model 485B39 dual channel USB interface. The iPhone microphone signal was routed directly to a USB-C to 3.5mm headphone adapter using SignalScope’s audio play through function (with measurement mode enabled) and from there to input 2 of the 485B39. The response between the 2 microphones was measured with SignalScope’s Dual FFT Analyzer (on a Mac) with the microphones facing toward and away from a loudspeaker which was generating a swept sine excitation signal. The […]<\/p>\n","protected":false},"author":3,"featured_media":2364,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[72,37,3,20],"tags":[227,213,15,98,226,30,11,195,22,136],"class_list":["post-2361","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hardware","category-ios","category-iphone","category-news","tag-anechoic-chamber","tag-directivity","tag-frequency-response","tag-iphone","tag-iphone-17-pro","tag-measurement","tag-microphone","tag-polar-plot","tag-signalscope","tag-top_post"],"_links":{"self":[{"href":"https:\/\/blog.faberacoustical.com\/wpblog\/wp-json\/wp\/v2\/posts\/2361","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.faberacoustical.com\/wpblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.faberacoustical.com\/wpblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.faberacoustical.com\/wpblog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.faberacoustical.com\/wpblog\/wp-json\/wp\/v2\/comments?post=2361"}],"version-history":[{"count":4,"href":"https:\/\/blog.faberacoustical.com\/wpblog\/wp-json\/wp\/v2\/posts\/2361\/revisions"}],"predecessor-version":[{"id":2371,"href":"https:\/\/blog.faberacoustical.com\/wpblog\/wp-json\/wp\/v2\/posts\/2361\/revisions\/2371"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.faberacoustical.com\/wpblog\/wp-json\/wp\/v2\/media\/2364"}],"wp:attachment":[{"href":"https:\/\/blog.faberacoustical.com\/wpblog\/wp-json\/wp\/v2\/media?parent=2361"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.faberacoustical.com\/wpblog\/wp-json\/wp\/v2\/categories?post=2361"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.faberacoustical.com\/wpblog\/wp-json\/wp\/v2\/tags?post=2361"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}